Z. Kassab-Bashi, Ammar, Nathim Th. Saieed, and Omar M. Omar. “Doubling the Chromosome Number of Black Poplar Trees (Populus Nigra L.) by Colchicine In Vitro”. Rafidain Journal of Science 25, no. 5 (October 1, 2014): 1–16. Accessed September 16, 2025. https://ojs.uomosul.edu.iq/index.php/rsci/article/view/47695.