Shparyk, Y. S., and T. V. Parpan. “Trends of Spruce forests’ Decline in the Ukrainian Carpathians: Case Study in the Wet Mezotrophic Common Beech – Silver Fir – Norway Spruce Forest Type”. Forestry and Forest Melioration, no. 136 (June 25, 2020): 37–45. Accessed April 15, 2021. http://forestry-forestmelioration.org.ua/index.php/journal/article/view/256.