1. [Renewable energy sources at Slovakia]
:MARSINA, Štefan. [Renewable energy sources at Slovakia]. In Advantages of renewable energy sources? : 29th international congress of CIRIEC : Vienna, 12.-14.9.2012. - [Vienna] : [S.n.], 2012, [S. 1-6] online. VEGA 319. Available on Internet: <http://www.ciriec.ulg.ac.be/en/pages/4_1congres.htm>