Sangsawang, M. and Chancharat, N. (2012) “Examining the Efficiency of Listed Animal Feed Manufacturers Using Data Envelopment Analysis”, Kasetsart Journal of Social Sciences, 33(3), pp. 429–441. available at: https://so04.tci-thaijo.org/index.php/kjss/article/view/246858 (accessed: 13 September 2026).