Krysovatyi, A., Saveliev, Y., Adamyk, V., Bohdanova, M., Borysov, B., Borsekova, K., Valihura, V., Vitalishova, K., Hospodynov, Y., Darvidu, K., Derkach, T., Zakhariiev, A., Koziuk, V., Lyzun, M., Lishchynskyi, I., Melnyk, A., Kyrylenko, O., Kyrylenko, S., Koloshta, S., … Chapkova, S. (2019). Europe of regions: benchmarking of regional development in Bulgaria, Poland, Slovakia and Ukraine. Herald of Economics, 4(86), 191-215. https://visnykj.wunu.edu.ua/index.php/htneu/article/view/981