WEISS, Erik et al. Evaluation and Comparison of Return of Investment for Proposed Use of Solar Systems in the Czech and Slovak Republic. - Registrovaný: Web of Science, Registrovaný: Scopus. In Metalurgija. - Zagreb : Croatian Metallurgical Society. ISSN 1334-2576, 2012, vol. 51, no. 3, pp. 365-368.