Панкратьєва, В. В. “Modeling of Education system’s Developmental Trajectory in Lugansk Region”. Visnyk of V. N. Karazin Kharkiv National University, Series "Geology. Geography. Ecology", Vol. 39, no. 1084, Dec. 2013, pp. 160-7, https://periodicals.karazin.ua/geoeco/article/view/7577.