KARYA, U.; RANI, A.; SRIVASTAVA, A. Tocolytic effect of combined sildenafil citrate and nifedepine versus nifedipine alone for management of preterm labour at a tertiary centre. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 10, n. 4, p. 1596–1601, 2021. DOI: 10.18203/2320-1770.ijrcog20211143. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/9923. Acesso em: 22 apr. 2025.