Ibrahim, Mohammed F., Faiq H. S. Hussain, and Giuseppe Zanoni. 2016. “Fatty Acid Characterization from Flowers of Tulipa Systola Stapf. Using Gas Chromatography-Mass Spectrometry (GC-MS)”. Science Journal of University of Zakho 4 (2):213-16. https://sjuoz.uoz.edu.krd/index.php/sjuoz/article/view/353.