ZALOZNOVA, Y. Innovation development of enterprises of the coal industry: problems and directions of providing. Skhid, [S. l.], n. 2(109), p. 35–39, 2013. DOI: 10.21847/1728-9343.2011.2(109).17353. Disponível em: https://skhid.kubg.edu.ua/article/view/17353. Acesso em: 2 may. 2024.