Hosseini, Bahman, Nikhkhah Amirabad, Hamedeh, Fattah, Mohammad, Gosta, Yort (2017). Effect of altitude and different phonological stages on essential composition and antioxidant activity of Ferula angulata (Schlecht.) Boiss from Dena altitudes. *Eco-phytochemical Journal of Medicinal Plants*, 5(1), 16-29.