Vithanage, Upul Yasantha Nanayakkara, Lokugam H. P Gunaratne, Kumara Mahipala M. B. P, and Hewa Waduge Cyril. 2014. “Comparison of Technical Efficiency and Socio-Economic Status in Animal-Crop Mixed Farming Systems in Dry Lowland Sri Lanka”. Asian Journal of Agriculture and Rural Development 4 (2):128-41. https://archive.aessweb.com/index.php/5005/article/view/1129.