Didier HUYGENS, Dirk LIPS and Stef AERTS
Bulletin of UASVM Agriculture 67 ( 1 ): 154 - 160 , 2010
Didier HUYGENS, Lucien CARLIER, Ioan ROTAR and Roxana VIDICAN
Bulletin of UASVM Agriculture 68 ( 1 ): 1 - 11 , 2011