PROTOPOPOVA, VIRA VIKTORIVNA, et al. “The History of Introduction and Present Distribution of Elaeagnus Angustifolia L. In the Black Sea Region of Ukraine”. CHORNOMORSKI BOTANICAL JOURNAL, vol. 2, no. 2, Dec. 2006, pp. 5-13, https://www.cbj.kspu.edu/index.php/cbj/article/view/719.