Kourtesi, S., P. Fousekis, and A. Polymeros. “Technical Efficiency of Greek Olive Growing Farms: A Robust Approach With Panel Data”. Spanish Journal of Agricultural Research 11, no. 4 (November 14, 2013): 908-918. Accessed April 27, 2024. https://sjar.revistas.csic.es/index.php/sjar/article/view/4423.