Los, S. A., O. M. Godovany, V. G. Grygoryeva, and Y. A. Gubin. “FEATURES OF ENGLISH OAK CROWN DEVELOPMENT AND REPRODUCTION IN SEED ORCHARDS AT THE HUTYANSKE FORESTRY ENTERPRISE, KHARKIV REGION”. Forestry and Forest Melioration, no. 131, Feb. 2018, pp. 87-95, http://forestry-forestmelioration.org.ua/index.php/journal/article/view/58.