Jacob D, Onadeko S, Nelson I, Shotuyo A. Evaluation of Old Oyo National Park efficiency using DEA Approach. ees [Internet]. 2020 Nov. 18 [cited 2024 Nov. 17];18(1 (45):193-210. Available from: https://czasopisma.uni.opole.pl/index.php/ees/article/view/2599