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.