Ivetić, Vladan, Zoran Maksimović, Ivona Kerkez, and Jovana R Devetaković. “Seedling Quality in Serbia – Results from a Three-Year Survey”. REFORESTA0, no. 4 (December 30, 2017): 27-53. Accessed February 20, 2020. http://journal.reforestationchallenges.org/index.php/REFOR/article/view/75.