Wills, V., J. Abraham, and N. S. Sreedevi. “Congenital Anomalies: The Spectrum of Distribution and Associated Maternal Risk Factors in a Tertiary Teaching Hospital”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 6, no. 4, Mar. 2017, pp. 1555-60, doi:10.18203/2320-1770.ijrcog20171427.