Kullman, Leif. “Forest-Limit (Betula Pubescens Ssp. Czerepanovii) Performance in the Context of Gentle Modern Climate Warming”. European Journal of Applied Sciences 10, no. 3 (May 24, 2022): 168–185. Accessed April 26, 2024. https://journals.scholarpublishing.org/index.php/AIVP/article/view/12369.