Ratphitagsanti, W. ., W. Chantrapornchai, I. . Promjan, and T. . Promarak. “Vanillin extraction from Thai vanilla pods using ohmic heating followed by ultrasound- or microwave-assisted extraction”. Agriculture and Natural Resources, vol. 58, no. 2, Apr. 2024, pp. 165–174, https://li01.tci-thaijo.org/index.php/anres/article/view/263162.