MANOVÁ, Eva et al. Mining Coal Production in Slovakia. - Registrovaný: Web of Science, Registrovaný: Scopus. In Acta Montanistica Slovaca. - Košice : Technical University of Košice. ISSN 1335-1788, 2019, vol. 24, no. 2, pp. 162-171 online. I-19-110-00.