Tony Traykov. "SOCIAL ISSUES AND ECONOMIC PERSPECTIVES FOR BULGARIAN MUNICIPALITIES ALONG THE BORDER WITH REPUBLIC OF SERBIA." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 20th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2020, Ecology, Economics, Education and Legislation (2020): 455-462. https://doi.org/10.5593/sgem2020/5.2/s21.056