CHAWANPAIBOON, S.; SUTANTAWIBUL, A.; PIMOL, K.; SIRISOMBOON, R.; WORAPITAKSANOND, S. Preliminary Study : Comparison of the Efficacy of Progesterone and Nifedipine in Inhibiting Threatened Preterm Labour in Siriraj Hospital. Thai Journal of Obstetrics and Gynaecology, Bangkok, Thailand, v. 17, n. 1, p. 23–29, 2009. Disponível em: https://he02.tci-thaijo.org/index.php/tjog/article/view/7669. Acesso em: 1 oct. 2026.