Khwankue, U., & Charmondusit, K. (2017). Evaluating the eco-efficiency of 3R waste from the petroleum and petrochemical group in the Map Ta Phut industrial estate, Thailand with the environmental improvement productivity indicator. Asia-Pacific Journal of Science and Technology, 13(9), 1107–1116. retrieved from https://so01.tci-thaijo.org/index.php/APST/article/view/83550