Błażejczyk-Majka, Lucyna. “Application of DEA for Evaluating the Efficiency of Economic Policy As Exemplified by EU Agriculture”. Studia Historiae Oeconomicae 35 (March 28, 2017): 163–176. Accessed December 6, 2025. https://pressto.amu.edu.pl/index.php/sho/article/view/29126.