สิงหศิริ ธ. Optimization for Biodiesel Production from Waste Chicken Fat Using Ultrasonic Assisted in Transesterification. KKU Science Journal, [S. l.], v. 43, n. 4, p. 738–748, 2015. Disponível em: https://ph01.tci-thaijo.org/index.php/KKUSciJ/article/view/249449. Acesso em: 26 aug. 2026.