Shahraji, T. R., M. Sheikhali, and H. Pourbabaei. “Leaves Polymorphism and Fruit Shapes Variation of Sorbus Torminalis (L.) Crantz in Hyrcanian Forest”. Advances in BioScience, vol. 4, no. 1, Jan. 2013, pp. 11-14, https://journals.sospublication.co.in/ab/article/view/120.