Ferrero A., Nigrelli G., Lipiec J., Nosalewicz A.:  Temperature of sloping vineyard with and without grass cover. (2000 r.) International Conference "Physical Methods in Agriculture" (Book of abstracts), Prague, Czech Republic, 27-30.08.2001 2001, 82-83 

Ferrero A., Lipiec J., Nigrelli G., Nosalewicz A.:  Conventional tillage or permanent grass cover in hillside vineyards: effects on soil physical characteristics. (2000 r.) International Conference "Physical Methods in Agriculture" (Book of abstracts), Prague, Czech Republic, 27-30.08.2001 2001, 80-81 

Ferrero A., Lipiec J., Nigrelli G., Nosalewicz A.:  Effects of increasing compaction levels on the efficiency of nitroge topdressing of grasses. (2000 r.) International Conference "Sustainable Soil Management for Environmental Protection, Soil Physical Aspects", Florence, Italy, 2-7.07.2001 2001, 11