Laohawilai, S., T. Sunthornpinij, and B. Silaruks. “Risk Factors for Perforated Appendicitis in a Tertiary Hospital”. The Clinical Academia, vol. 43, no. 5, Dec. 2019, pp. 171-8, https://he02.tci-thaijo.org/index.php/theclinicalacademia/article/view/221095.