Ferrero A., Lipiec J.:  Determining the influence of trampling on hillslope woodland soil. (1997 r.) 6-th International Conference on Agrophysics, Lublin 15-18.09.1997 r 1997,

Ferrero A., Molenda M.:  Device for continuous measurement of straw briquette expansion. (1997 r.) 6-th International Conference on Agrophysics, Lublin 15-18.09.1997 r 1997,