Theunissen, I., & Vanlierde, M. (1989). Preterm Premature Rupture of the Membranes - Neonatal Outcome in 215 Cases of An Active Conservative Management. Journal of Perinatal Medicine : official journal of the World Association of Perinatal Medicine, 17(6), 423-432. https://doi.org/10.1515/jpme.1989.17.6.423 (Original work published 1989)