TANMOUN, N.; RAUNGRONGMORAKOT, K.; RUANGVUTILERT, P.; BORIBOONHIRUNSARN, D.; TONTISIRIN, P.; BUTSANSEE, W. Correlation of Cervical Length Obtained from Transperineal Ultrasonography, Transvaginal Ultrasonography and Digital Examination. Thai Journal of Obstetrics and Gynaecology, Bangkok, Thailand, v. 15, n. 3, p. 137–144, 2017. Disponível em: https://he02.tci-thaijo.org/index.php/tjog/article/view/83341. Acesso em: 1 oct. 2026.