7Maxwel G. Preterm premature rupture of membrane. Obstet Gynecol Sury, 1993,48:576.
8Gancherand P, Guiband S, Rudigoz RC, et al. Diagnosis of premature rupture of the membrane by the identification of alpha-fetoprotein on vaginal secretions. Act Obstet Gynecol Scand, 1994,73:456.