Distribution of steroidal saponins in Tribulus terrestris from different geographical regions Dinchev, Dragomir ; Janda, Bogdan ; Evstatieva, Liuba ; Oleszek, Wieslaw ; Aslani, Mohammad R. ; Kostova, Ivanka Abstract Publication: Phytochemistry Pub Date: January 2008 DOI: 10.1016/j.phytochem.2007.07.003 Bibcode: 2008PChem..69..176D