Kannika Chatchavalvanich, and Sukjai Mahantasanapong. “Histological Structure of the Digestive Organs in Siamese Cobra (Naja kaouthia)”. Agriculture and Natural Resources, vol. 27, no. 3, Sept. 1993, pp. 314-23, https://li01.tci-thaijo.org/index.php/anres/article/view/241569.