HLAVŇOVÁ, Barbara - SVITEKOVÁ, Milena - SIMONIDESOVÁ, Jana. Analysis of the energy mix of Slovakia in the context of improvement of quality of the environment. - Registrovaný: SCOPUS. In Communications : scientific letters of the University of Žilina. - Žilina : Žilinská univerzita v Žiline, 2012. ISSN 1335-4205, 2012, vol. 14, č. 4A, s. 68-72.