Pach-Gurgul, Agnieszka. “The Chief Determinants of Crude Oil Prices in the World in 2014 and 2015”. Studies of the Industrial Geography Commission of the Polish Geographical Society 30, no. 3 (January 17, 2017): 185–198. Accessed June 23, 2024. https://prace-kgp.uken.krakow.pl/article/view/3300.