Ledenko, M., J. Velić, and D. Karasalihović-Sedlar. “Analysis of Oil Reserves, Production and Oil Price Trends in 1995, 2005, 2015”. Rudarsko-geološko-Naftni Zbornik, Vol. 33, no. 4, July 2018, https://hrcak.srce.hr/ojs/index.php/rgn/article/view/7146.