HYRÁNEK, Eduard et al. Verification of the Performance Model in Selected Companies in the Mining Industry. - Registrovaný: Scopus, Registrovaný: Web of Science. In Acta Montanistica Slovaca. - Košice : Technical University of Košice. ISSN 1335-1788, 2021, vol. 26, no. 3, pp. 415-426 online. VEGA 1/0462/19.