• Raytchev T., Rousseva S., Sokołowska Z., Hajnos M., Józefaciuk G.:  Struktura na poczwiennaja adsorbent. Teoria i priłożenie (2012 r.) Izdatjelstwo "PubliszSajSet-Eko" 2012, 1-119
  • Raytchev T., Rousseva S., Benkova M., Sokołowska Z., Hajnos M., Józefaciuk G.:  Organo mineral interaction on heavy metal and arsenic contaminated acid soils (2011 r.) Proceedings, International Conference, 100 Years Bulgarian Soil Science, Bulgaria, Sofia, 16-20.05.2011 r. 2011, 939-943
  • Benkova M., Raytchev T., Dinev N., Sokołowska Z., Hajnos M., Józefaciuk G.:  Comparative research of the effectiveness of organo-mineral melioration on heavy metals polluted soil. Changes in soil acidity (2011 r.) Proceedings, International Conference, 100 Years Bulgarian Soil Science, Bulgaria, Sofia, 16-20.05.2011 r. 2011, 812-817
  • Raytchev T., Józefaciuk G., Sokołowska Z., Hajnos M., Rousseva S., Benkova M.:  Surface properties of soils and their behavior in degradation processes (2011 r.) Proceedings, International Conference, 100 Years Bulgarian Soil Science, Bulgaria, Sofia, 16-20.05.2011 r. 2011, 261-265
  • Sokołowska Z., Dąbek-Szreniawska M., Całka A., Raytchev T., Popandova S.:  Influence of soil management on granulometric composition of pseudopodzolic soil. (2007 r.) International Conference \"Soil Science - Base for Sustainable Agriculture and Environment Protection, Sofia, 13-17.05.2007 13-17.05.2007, 97-100 
  • Sokołowska Z., Raytchev T., Hajnos M., Józefaciuk G., Popandova S.:  Surface properties of selected Bulgarian soils evaluated from adsorption of water vapour. (2007 r.) International Conference \"Soil Science - Base for Sustainable Agriculture and Environment Protection, Sofia, 13-17.05.2007 13-17.05.2007, 101-104 
  • Raytchev T., Filcheva E., Benkova M., Rousseva S., Sokołowska Z., Józefaciuk G., Hajnos M.:  Influence of humic substances on the stability of soil adsorbents and mobility of cations, included In the soil adsorbent structure. (2006 r.) XIII Kongres Międzynarodowego Towarzystwa Substancji Organicznej nt.: "Substancje Humusowe - Powiązanie Struktury z Funkacjami". Niemcy, 30.07-04.08.2006 r. 2006,
  • Raytchev T., Filcheva E., Rousseva S., Benkova M., Sokołowska Z., Józefaciuk G., Hajnos M.:  Distribution of humus substances In the structure of soil adsorbents - theoretical analysis. (2006 r.) XIII Kongres Międzynarodowego Towarzystwa Substancji Organicznej nt.: "Substancje Humusowe - Powiązanie Struktury z Funkacjami". Niemcy, 30.07-04.08.2006 r. 2006,
  • Raytchev T., Rousseva S., Filcheva E., Benkova M., Hajnos M., Sokołowska Z., Józefaciuk G.:  Influence of humus substances on the structural-adsorption status of soil adsorbents. (2006 r.) XIII Kongres Międzynarodowego Towarzystwa Substancji Organicznej nt.: "Substancje Humusowe - Powiązanie Struktury z Funkacjami". Niemcy, 30.07-04.08.2006 r. 2006,
  • Raytchev T., Józefaciuk G., Sokołowska Z., Hajnos M.:  Physicochemical menagement of acid soils polluted with heavy metals. (2005 r.) Institute of Agrophysics PAS, Lublin 2005, str. całości 1-93, l. ark. wyd. 6,6 
  • Raytchev T., Józefaciuk G., Sokołowska Z., Hajnos M.:  Physicochemical character of soil adsorbent. (2005 r.) Institute of Agrophysics PAS, Lublin 2005, str. całości 1-149, l. ark. wyd. 10,6 
  • Raytchev T., Arsova A., Popandova S., Józefaciuk G., Sokołowska Z.:  Theoretical analysis of pH-buffering reactions of humic compounds during melioration of acid soils polluted with heavy metals. (2005 r.) Institute of Agrophysics PAS, Lublin, "Physicochemical management of acid soils polluted with heavy metals" 2005, 86-93 
  • Benkova M., Rousseva S., Raytchev T., Józefaciuk G., Hajnos M.:  Impact of different ameliorants on aggregate stability of acid soil polluted with heavy metals. (2005 r.) Institute of Agrophysics PAS, Lublin, "Physicochemical management of acid soils polluted with heavy metals" 2005, 32-45 
  • Benkova M., Filcheva E., Raytchev T., Sokołowska Z., Hajnos M.:  Impact of different ameliorants on humus state in acid soil polluted with heavy metals. (2005 r.) Institute of Agrophysics PAS, Lublin, "Physicochemical management of acid soils polluted with heavy metals" 2005, 46-58 
  • Benkova M., Raytchev T., Dinev N., Hajnos M., Józefaciuk G.:  Alfalfa growth and heavy metal uptake after addition of lime, peat and ferriferous material to acid soil. (2005 r.) Institute of Agrophysics PAS, Lublin, "Physicochemical management of acid soils polluted with heavy metals" 2005, 59-73 
  • Benkova M., Raytchev T., Dinev N., Sokołowska Z., Hajnos M., Józefaciuk G.:  Alfalfa yield and copper uptake after treatment of heavy metals polluted soil with lime, coal powder and ferric oxide. (2005 r.) Institute of Agrophysics PAS, Lublin, "Physicochemical management of acid soils polluted with heavy metals" 2005, 74-85 
  • Raytchev T., Toncheva R., Donov D., Józefaciuk G., Sokołowska Z.:  Ion-excange ability of soil adsorbent, kinetics of cation desorption. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 114-132 
  • Raytchev T., Rousseva S., Mehandjiev D., Hajnos M., Sokołowska Z.:  Influence of humus substances on hydrophilicity and energy state of soil adsorbent. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 133-147 
  • Arsova A., Raytchev T., Józefaciuk G., Sokołowska Z.:  Alfalfa yield dependence on organo-mineral liming of heavy metal polluted soil. (2005 r.) Institute of Agrophysics PAS, Lublin, "Physicochemical management of acid soils polluted with heavy metals" 2005, 7-14 
  • Raytchev T., Filcheva E., Benkova M., Sokołowska Z., Hajnos M.:  Effect of composting period of peat and manure on physicochemical properties of dystric fluvisol polluted with copper. (2005 r.) Institute of Agrophysics PAS, Lublin, "Physicochemical management of acid soils polluted with heavy metals" 2005, 15-31 
  • Raytchev T., Jokova M., Józefaciuk G., Hajnos M.:  Distribution of surface charge on soil colloids. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 103-113 
  • Raytchev T., Donov D., Paskaleva K., Hubenov G., Sokołowska Z., Hajnos M.:  Impact of the analytical treatments on the crystalo-chemical characteristics of the mineral part of the soil adsorbent. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 60-72 
  • Raytchev T., Filcheva E., Hajnos M., Sokołowska Z.:  Humus system stability of soil adsorbent. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 73-88 
  • Raytchev T., Filcheva E., Hajnos M., Sokołowska Z.:  Differencies in stability of soil organic matter fractions during thermo-oxidizable destruction. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 89-102 
  • Raytchev T., Rousseva S., Mehandjiev D., Józefaciuk G., Sokołowska Z.:  Structural-adsorption state of the soil adsorbent at macro-aggregative level of the soil organization. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, Physicochemical character of soil adsorbent, 7-20 
  • Raytchev T., Mehandjiev D., Rousseva S., Józefaciuk G., Hajnos M.:  Structural-adsorption state of the soil clay fraction. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 21-41 
  • Mehandjiev D., Raytchev T., Sokołowska Z., Hajnos M.:  On the anomalus shape of low-temperature nitrogen adsorption isotherms of <2 m clay fractions isolated from soils. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 42-51 
  • Raytchev T., Rousseva S., Mehandjiev D., Hajnos M., Józefaciuk G.:  Porosity of the soil adsorbent. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Physicochemical character of soil adsorbent" 2005, 52-59 
  • Benkova M., Filcheva E., Raytchev T., Sokołowska Z., Hajnos M.:  Changes in humus of acid soil polluted with heavy metals under physicochemical amelioration. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Review of Current Problems in Agrophysics" 2005, Chapter 5, Physics and Physical Chemistry in Environmental Processes, 383-386 
  • Benkova M., Rousseva S., Raytchev T., Józefaciuk G., Hajnos M.:  Aggregate stability of acid soil polluted with heavy metals as affected by different ameliorating agents. (2005 r.) Institute of Agrophyscis PAS, Lublin, "Review of Current Problems in Agrophysics" 2005, Chapter 5, Physics and Physical Chemistry in Environmental Processes, 387-391 
  • Raytchev T., Filcheva E., Sokołowska Z.:  Physico-chemical assessment of humus system stability (2004 r.) Institute of Agrophysics PAS, Lublin "Modern Physical and Physicochemical Methods and Their Applications in Agroecological Research" 2004, Institute of Agrophysics PAS, Lublin "Modern Physical and Physicochemical Methods and Their Applications in Agroecological Research", 134-141 
  • Józefaciuk G., Raytchev T.:  Surface properties of soil and plant materials, measurements, theories and applications (2004 r.) Institute of Agrophysics PAS, Lublin "Modern Physical and Physicochemical Methods and Their Applications in Agroecological Research" 2004, Institute of Agrophysics PAS, Lublin "Modern Physical and Physicochemical Methods and Their Applications in Agroecological Research", 68-78 
  • Raytchev T., Arsova A., Popandova S., Sokołowska Z., Hajnos M., Józefaciuk G.:  Methods for ameliorating Na-saline soils and copper polluted acid soils by using organo-mineral wastes (2004 r.) Institute of Agrophysics PAS, Lublin "Modern Physical and Physicochemical Methods and Their Applications in Agroecological Research" 2004, Institute of Agrophysics PAS, Lublin "Modern Physical and Physicochemical Methods and Their Applications in Agroecological Research", 116-124 
  • Raytchev T., Atanassova I., Hajnos M.:  Electronic configuration and types of bondings in the crystal-chemical structure of clay minerals (2004 r.) Institute of Agrophysics PAS, Lublin "Modern Physical and Physicochemical Methods and Their Applications in Agroecological Research" 2004, Institute of Agrophysics PAS, Lublin "Modern Physical and Physicochemical Methods and Their Applications in Agroecological Research", 125-133 
  • Atanassova I., Benkova M., Raytchev T., Józefaciuk G.:  Analysis of a technogenically degraded soil using a rapid method for clay fraction separation (2004 r.) Institute of Agrophysics PAS, Lublin "Modern Physical and Physicochemical Methods and Their Applications in Agroecological Research" 2004, Institute of Agrophysics PAS, Lublin "Modern Physical and Physicochemical Methods and Their Applications in Agroecological Research", 7-10 
  • Raytchev T., Arsova A., Popandova S., Sokołowska Z., Hajnos M., Józefaciuk G.:  Methods for ameliorating Na-saline soils and copper poluuted acid soils by using organo-mineral wastes (2004 r.) International Conference "Agroecological Interrelations of Physicochemical and Physical Parameters of Soils and Plants. Methods and Applications", Sofia, 21.09.2004 r. 2004, International Conference "Agroecological Interrelations of Physicochemical and Physical Parameters of Soils and Plants. Methods and Applications", Sofia, 21.09.2004 r. - referat 
  • Raytchev T., Atanassova I., Hajnos M.:  Electronic configuration and types of bondings in the crystal-chemical structure of clay minerals (2004 r.) International Conference "Agroecological Interrelations of Physicochemical and Physical Parameters of Soils and Plants. Methods and Applications", Sofia, 21.09.2004 r. 2004, International Conference "Agroecological Interrelations of Physicochemical and Physical Parameters of Soils and Plants. Methods and Applications", Sofia, 21.09.2004 r. - referat 
  • Raytchev T., Filcheva E., Sokołowska Z.:  Physico-chemical assessment of humus system stability (2004 r.) International Conference "Agroecological Interrelations of Physicochemical and Physical Parameters of Soils and Plants. Methods and Applications", Sofia, 21.09.2004 r. 2004, International Conference "Agroecological Interrelations of Physicochemical and Physical Parameters of Soils and Plants. Methods and Applications", Sofia, 21.09.2004 r. - referat 
  • Józefaciuk G., Raytchev T.:  Behavior of soil charge in degradation processes (2004 r.) International Conference "Agroecological Interrelations of Physicochemical and Physical Parameters of Soils and Plants. Methods and Applications", Sofia, 21.09.2004 r. 2004, International Conference "Agroecological Interrelations of Physicochemical and Physical Parameters of Soils and Plants. Methods and Applications", Sofia, 21.09.2004 r. - referat 
  • Raytchev T., Hajnos M., Józefaciuk G.:  Modification of soil mesopore structure by fulvic acid. (2003 r.) Ecology and Future Bulgarian Journal of Ecological Science 2003, 2, 3-4, 75-76 
  • Raytchev T., Józefaciuk G., Sokołowska Z.:  Effect of organic matter removal on fractal dimension of soil clay fraction. (2003 r.) Ecology and Future Bulgarian Journal of Ecological Science 2003, 2, 3-4, 73-74 
  • Raytchev T., Józefaciuk G., Sokołowska Z.:  Effect of organic matter removal on fractal dimension of soil clay fraction. (2003 r.) Second National Conference OnHumus Substances With International Participation "Humus Substances And The Environment", Borovetz, Bulgaria, 17-19.09.2003 2, 3-4, 73-74 
  • Raytchev T., Hajnos M., Józefaciuk G.:  Modification of soil mesopore structure by fulvic acid. (2003 r.) Second National Conference OnHumus Substances With International Participation "Humus Substances And The Environment", Borovetz, Bulgaria, 17-19.09.2003 2, 3-4, 75-76 
  • Arsova A., Raytchev T., Popandova S., Sokołowska Z., Hajnos M., Józefaciuk G.:  Methods for ameliorating na-saline soils and copper polluted acid soils by using organo-mineral wastes. (2002 r.) ISWA World Environment Congress & Exhibition, Turkey, Istanbul, 8-12.07.2002 r. 2002,
  • Sokołowska Z., Raytchev T., Arsova A.:  Surface area and surface fractal dimension of selected Bulgarian soils. (2002 r.) Soil Science Agrochemistry and Ecology 2002, XXXVII, 1-3, 147-149 
  • Raytchev T., Arsova A., Popandova S., Sokołowska Z., Hajnos M., Józefaciuk G.:  Applicability of Organo-mineral Meliorative Agent for Zinc Polluted Acid Soils. (2002 r.) Soil Science Agrochemistry and Ecology 2002, XXXVII, 1-3, 141-143 
  • Hajnos M., Raytchev T., Popandova S.:  Structure formation of clay minerals microagregates in relation to ionic composition and surface free energy. (2002 r.) Soil Science Agrochemistry and Ecology 2002, XXXVII, 1-3, 144-146 
  • Raytchev T., Arsova A., Popandova S., Józefaciuk G., Sokołowska Z., Hajnos M.:  Role of chelating processes in formation of buffer systems under organo-mineral melioration of Cu and Zn polluted acid soils (II). (2001 r.) Bulgarian Journal of Agricultural Science 2001, 7, 167-174 
  • Raytchev T., Arsova A., Popandova S., Józefaciuk G., Sokołowska Z., Hajnos M.:  Mechanisms of chelate formation during organo-mineral melioration of heavy metals polluted acid soils (I). (2001 r.) Bulgarian Journal of Agricultural Science 2001, 7, 43-47 
  • Raytchev T., Popandova S., Józefaciuk G., Hajnos M., Sokołowska Z.:  Physicochemical reclamation of saline soils using coal powder. (2001 r.) International Agrophysics 2001, 15, 1, 51-54 
  • Sokołowska Z., Raytchev T., Arsova A.:  Surface area and surface fractal dimension of selected bulgarian soils. (2000 r.) National Conference with International Participation "90 Years Soil Science in Bulgaria", Sofia, 13-15.09. 2001 2001, 70 
  • Raytchev T., Arsova A., Popandova S., Sokołowska Z., Hajnos M., Józefaciuk G.:  Applicability of organo-mineral meliorative agent for zinc polluted acid soils. (2000 r.) National Conference with International Participation "90 Years Soil Science in Bulgaria", Sofia, 13-15.09. 2001 2001, 69 
  • Hajnos M., Raytchev T., Popandova S.:  Structure formation of clay minerals microaggregates in relation to ionic composition and surface free energy. (2000 r.) National Conference with International Participation "90 Years Soil Science in Bulgaria", Sofia, 13-15.09. 2001 2001, 70 
  • Raytchev T., Popandowa S., Józefaciuk G., Hajnos M., Sokołowska Z.:  Physicochemical reclamation of saline soils using coal powder. (1999 r.) Ogólnopolska Konferencja Naukowa Polskiego Towarzystwa Agrofizycznego pt. "Fizyczna degradacja gleb: prognozowanie, metody ochrony i rekultywacji", Lublin, 9.09.1999 r. 1999,
  • Popandova S., Raytchev T., Arsova A., Józefaciuk G., Hajnos M., Sokołowska Z.:  Possibilities to improve the absorption properties of soils affected by salinity. (1998 r.) 16 Światowy Kongres Gleboznawczy ISSS. Francja, Montpellier, 20-26.08.1998 r. 1998,
  • Popandova S., Raytchev T., Arsova A., Józefaciuk G., Hajnos M., Sokołowska Z.:  Possibilities to improve the absorption properties of soils affected by salinity. (1998 r.) 16 Światowy Kongres Gleboznawczy ISSS. Francja, Montpellier, 20-26.08.1998 r. 1998,