Balcsók, I., B. Baranyi, L. Dancs, G. Koncz, Z. Raffay, and G. Szabó. “BACKGROUND STUDY OF THE HUNGARIAN–ROMANIAN AND THE HUNGARIAN–UKRAINIAN BORDER REGIONS”. Discussion Papers, no. Special, July 2012, pp. 12-67, https://dp.ojs.rkk.hu/index.php/DP/article/view/2233.