SAMSONYUK K, STETSENKO T, PETRYK O. REGIONAL DIFFERENTIATION OF HIGHER EDUCATION SERVICES IN UKRAINE. ESG [Internet]. 2015 Jun. 30 [cited 2026 Jul. 15];72:47-53. Available from: https://www.bulletin-esgeograph.org.ua/esg/article/view/72-samsoniuk-et-al-47-53