SAPYTSKA, I. "Strong" and "weak" points are certain in coal industry. Skhid, [S. l.], n. 3(117), p. 54–58, 2013. DOI: 10.21847/1728-9343.2012.3(117).16458. Disponível em: https://skhid.kubg.edu.ua/article/view/16458. Acesso em: 5 may. 2024.