Sroiwatana, Chullasak, Paiboon Charoenchainont, and Kasem Kaewkiattikun. “Comparative Study of Slip Rate and Neonatal Complications in Vacuum Extraction between Stepwise and Rapid Application of Suction”. Vajira Medical Journal : Journal of Urban Medicine 45, no. 3 (September 21, 2011): 171–178. accessed April 6, 2025. https://he02.tci-thaijo.org/index.php/VMED/article/view/156.