GAVUROVÁ, Beáta et al. Exploration of Disparities in Environmental Activities of European Countries from Year 2006 to Year 2016. - Registrovaný: Scopus, Registrovaný: Web of Science. In Acta Montanistica Slovaca. - Košice : Technical University of Košice. ISSN 1335-1788, 2019, vol. 24, no. 4, pp. 376-390 online. VEGA 1/0797/20.