Skarżyński, Mirosław. “Sichertheit Der Erdölversorgung in Polen 1918-2007. Von Der Autarkie Zur Abhängigkeit [Security of Oil Supplies in Poland 1918-2007. From Autarky to Dependence]”. Studia Historiae Oeconomicae, vol. 27, no. 1, June 2009, pp. 185-04, doi:10.14746/sho.2009.27.1.013.