Habibi, H. ., and G. . H. Talaei. “Effect of Biological Phosphate and Chemical Phosphorus Fertilizer on Yield and Yield Components of Ajowan (Carum Copticum) Medicinal Plant”. Agricultural Advances, vol. 3, no. 4, Apr. 2014, pp. 88-94, http://sjournals.com/index.php/aa/article/view/718.