KOTTFEROVÁ, Nikola - MOKRIŠOVÁ, Martina - PETROVIČ, Ján - ĎUROVE, Juraj B. - KIZEK, Ján. Analysis of sustainable development of coal supply from the perspective of the energy security in the EU and the Slovak republic. In Interdisciplinarity in theory and practice : journal for presentation of interdisciplinary approaches in various fields. - Arad : Adoram, 2016. ISSN 2344-2409, 2016, nr. 10, pp. 327–336 online.