Novikov, Arthur, and Vladan Ivetić. “The Effect of Seed Size Grading on Seed Use Efficiency and Height of One-Year-Old Container-Grown Scots Pine (Pinus Sylvestris L.) Seedlings”. REFORESTA, no. 6 (December 28, 2018): 100-109. Accessed January 21, 2019. http://journal.reforestationchallenges.org/index.php/REFOR/article/view/100.