Pol, Shashikant Anil, Surinder K. Singhal, Nitin Gupta, and Shalima Pulpra Sivanandan. 2019. “Recurrent Collaural Fistula: A Challenge”. International Journal of Otorhinolaryngology and Head and Neck Surgery 5 (5):1404-6. https://doi.org/10.18203/issn.2454-5929.ijohns20193892.