Abdul- Razaq, Rupak T. “A New Record Of the Genus Pyrus -Subfamily Pomoideae ( Rosaceae) in Iraqi Kurdistan”. Ibn AL-Haitham Journal For Pure and Applied Sciences, vol. 26, no. 2, Apr. 2017, pp. 29-35, https://jih.uobaghdad.edu.iq/index.php/j/article/view/458.