Duangkamol, Chuthamat, Khemmanat Phapattamas, Parichat Burikan, Siripakr Nisakorn, Yosita Akesakrulsab, Kanokrada Kongtawee, and Natthaporn Manojai. 2025. “Comparative study on galacturonic acid and its antioxidant activity of pectin from fruit waste peels”. SciTech Research Journal 8 (1). Maha Sarakham, Thailand:137-48. https://ph02.tci-thaijo.org/index.php/jstrmu/article/view/254413.