TARIEIEV, A., BOJKO, V., MOYSIYENKO, I., & KOSTIKOV, I. (2013). Similarity of Betula borysthenica Klokov with intraspecific taxa of Betula pubescens Ehrh. CHORNOMORSKI BOTANICAL JOURNAL, 9(2), 158-169. https://www.cbj.kspu.edu/index.php/cbj/article/view/380