Taengsakul, N. “Small bowel metastasis with multiple sites of perforation caused by anaplastic thyroid carcinoma metastasis: A case report”. Journal of the Association of General Surgeons of Thailand under the Royal of Patronage of HM the King, vol. 9, no. 1, May 2024, pp. 13-21, https://he02.tci-thaijo.org/index.php/agstjournal/article/view/268693.