Опара, В. М., І. М. Бузіна, and О. Г. Босенко. “Cartographic Modelling of agroecosystems’ Ecological State”. Visnyk of V. N. Karazin Kharkiv National University. Series Geology. Geography. Ecology, no. 45, Mar. 2017, pp. 166-71, https://periodicals.karazin.ua/geoeco/article/view/8194.