A. Saraswathy, J. V. Vaman, M. Brahmanandan, and N. C., “Correlation between obstetric outcome and amniotic fluid index (AFI) in preterm prelabour rupture of membranes (PPROM)”, Int J Reprod Contracept Obstet Gynecol, vol. 7, no. 12, pp. 4858–4861, Nov. 2018.