Ρεζίτης Α. Ν., Τσιμπούκας Κ., and Τσουκαλάς Σ. “Efficiency and Productivity Growth of Crop-Oriented Farms Participating in the European Union Farm Credit Program (Re. 2328/91)”. SPOUDAI Journal of Economics and Business, vol. 55, no. 2, Apr. 2005, pp. 94-119, https://spoudai.org/index.php/journal/article/view/395.