BILČÍK, Matúš et al. Comparison of the annual power balance of photovoltaic modules. In Journal on processing and energy in agriculture. ISSN 1821-4487, 2020, vol. 24, no. 1, s. 18-21. Available on Internet:<https://scindeks.ceon.rs/article.aspx?query=ISSID%26and%2615021&page=4&sort=8&stype=0&backurl=%2fissue.aspx%3fissue%3d15021>