SAPYTSKA, I. Restructuring of coal mines: information resources. Skhid, [S. l.], n. 5(137), p. 90–94, 2015. DOI: 10.21847/1728-9343.2015.5(137).51069. Disponível em: http://skhid.kubg.edu.ua/article/view/51069. Acesso em: 25 jan. 2022.