Sustainable development in polyethnic border regions of Ukraine (on the example of Transcarpathia)Mykhaylo Pityulych, Kateryna Sochka, Victoriia Makarovych, Oksana Yoltukhovska and Nataliya KeretsmanE3S Web Conf., 255 (2021) 01047DOI: https://doi.org/10.1051/e3sconf/202125501047