Marzieh Matin Yekta, Seyed Hamid Reza Alavi, Yousef Ajani, and Reza Hadjiaghaee, “Flavonoid Glycosides from Tribulus terrestrisL.orientalis: Flavonoids from Tribulus terrestrisL”, Iran J Pharm Sci, vol. 4, no. 3, pp. 231–236, Jul. 2008.