Rejman J., Helming K., Dębicki R.:         
    
        Effect of surface conditions on runoff and soil loss for chernozem soil. (2001 r.)   
        
        International Agrophysics 
                
                
            2001, 15, 1, 55-58 
                                 
    
     
            
         Rejman J., Helming K., Dębicki R.:         
    
        Effect of soil surface conditions on runoff and soil loss for a chernozem soil.  (1997 r.)   
        
         
         
            6-th International Conference on Agrophysics, Lublin 15-18.09.1997 r               
                    1997,