CHECHEL, A.; KONOPLYOV, S. Approaches for estimating the degree of depression of a territory (a region). Skhid, [S. l.], n. 6(126), p. 180–185, 2014. DOI: 10.21847/1728-9343.2013.6(126).20629. Disponível em: http://skhid.kubg.edu.ua/article/view/20629. Acesso em: 27 oct. 2021.