Valse, D., and H. K. Nagarathna. “A Study on Risk Factors of Deafness in Neonates: A Descriptive Study”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 3, no. 3, June 2017, pp. 559-61, doi:10.18203/issn.2454-5929.ijohns20172655.