ВОЛКОВ, А. І., and О. В. ПОПИК. 1. “Abilities of Geoinformational Systems for Functional Zoning of Conservation Areas (on the Example of NNP «Homelshansky lisi»)”. Visnyk of V. N. Karazin Kharkiv National University. Series Еcоlogy, no. 1147 (1), 33-40. https://periodicals.karazin.ua/ecology/article/view/3918.