Khapugin, Anatoliy, and Maria A. Senchugova. “The Age Structure of a Cypripedium Guttatum (Orchidaceae) Population in the Tyumen Region, Western Siberia”. Journal of Wildlife and Biodiversity 7, no. 2 (October 9, 2022): 35–44. Accessed April 27, 2024. https://wildlife-biodiversity.com/index.php/jwb/article/view/277.