Poramanusith, U. “Development of system for prevention and management of early postpartum hemorrhage following vaginal delivery at Pakchong Nana Hospital”. Maharat Nakhon Ratchasima Hospital Journal, vol. 41, no. 1, July 2024, pp. 13-20, https://he04.tci-thaijo.org/index.php/MNRHJ/article/view/1326.