GAYKO, G.; BILETSKY, V. The discoverer of the Donetsk coal. Skhid, [S. l.], n. 2(142), p. 26–33, 2016. DOI: 10.21847/1728-9343.2016.2(142).70446. Disponível em: https://skhid.kubg.edu.ua/article/view/70446. Acesso em: 27 apr. 2024.