Parichatnon, Surakiat, Kamonthip Maichum, and Ke Chung Peng. 2017. “Measuring Efficiency, Technical Change and Productivity Trend Using Malmquist Productivity Index Analysis: A Case Study of Rice Production in Thailand”. The International Journal of Business & Management 5 (1). http://www.internationaljournalcorner.com/index.php/theijbm/article/view/123367.