Gomes, F., Ramalho, C., Machado, A.P., Calado, E., Cardoso, F. and Montenegro, N. 2006. Transvaginal ultrasound assessment of the cervix and digital examination before labor induction. Acta Médica Portuguesa. 19, 2 (Aug. 2006), 109–14. DOI:https://doi.org/10.20344/amp.921.