Tongkham, Nudthapong, Boonyawee Juntasalay, Patareeya Lasunon, and Nipaporn Sengkhamparn. 2017. “Dragon Fruit Peel Pectin: Microwave-Assisted Extraction and Fuzzy Assessment”. Agriculture and Natural Resources 51 (4). Bangkok, Thailand:262-67. https://li01.tci-thaijo.org/index.php/anres/article/view/239984.