T. V., E. and M. V., M. 2024. Variability of morphological features in closely related species of the subgenus Nominium of the genus Viola. Проблемы ботаники Южной Сибири и Монголии. 23, 2 (Nov. 2024), 101-106. DOI:https://doi.org/10.14258/pbssm.2024071.