Kritnikornkul, Amornchai, Thanaphon Sa-ngiamphorn, Chatchai Kosonsasitorn, Sudathip Nimkingratana, Narin Kaewma, and Chotirot Angkurawaranon. “Effect of early oral feeding within 24 hours compared to standard oral feeding in peptic ulcer and proximal small bowel perforation, A non-randomized controlled trial”. Journal of Nakornping Hospital 14, no. 1 (June 24, 2023): 151–162. accessed September 28, 2026. https://he01.tci-thaijo.org/index.php/jnkp/article/view/262729.