Phongmanjit, Phichai. “Utilization of Handcrafted Trocar ‘PP-Ports Trocar’ in Laparoscopic Cholecystectomy”. Journal of the Association of General Surgeons of Thailand under the Royal of Patronage of HM the King 9, no. 1 (May 8, 2024): 6–12. accessed December 8, 2025. https://he02.tci-thaijo.org/index.php/agstjournal/article/view/268167.