"The Morphological Change in Sunflower Plant under Hardening Conditions to Drought Tolerance. II. Leaf Number and Leaf Area". مجلة بغداد للعلوم, م 6, عدد 3, سبتمبر، 2009, ص 470-9, https://doi.org/10.21123/bsj.2009.6.3.470-479.