ADAMUŠČIN, Andrej et al. Possibilities of Free Tools, in Informative Calculation of the Energy Performance of the House in the Slovak Republic. - Registrovaný: Scopus. In 19th International Multidisciplinary Scientific Geoconference SGEM 2019. SGEM 2019 Conference Proceedings : 19th International Multidisciplinary Scientific Geoconference. - Sofia : STEF92 Technology, 2019. ISBN 978-619-7408-86-7. ISSN 1314-2704, pp. 565-571 online.