นันทสำเริง น. Application of Center of Risk Gravity in the Location Analysis for a Siting of Emergency Medical Service Vehicles. Front Eng Innov Res. [internet]. 2011 Dec. 30 [cited 2026 Sep. 3];2:21-9. available from: https://ph01.tci-thaijo.org/index.php/jermutt/article/view/242133