Hauke-Kowalska, Maria, Elżbieta Borowiak, Władysław Barzdajn, Wojciech Kowalkwski, Robert Korzeniewicz, and Tomasz Wawro. “Cone and Seeds Variability in Seed Orchards and Seed Stands of Pinus Sylvestris L”. Baltic Forestry 25, no. 2 (December 31, 2019): 187–192. Accessed December 3, 2024. https://balticforestryojs.lammc.lt/ojs/index.php/BF/article/view/138.