Ferrero A., Lipiec J., Nosalewicz A., Parena S.:
Conventional tillage or permanent grass cover in hillside vineyards: effects on soil physical characteristics. (2000 r.)
Physical Metohods in Agriculture - Approach to Precision and Quality 20(PMA)01, Czech University of Agricultire, Prague, 27-30.08.2001
2001, 88-92