Sharma, J. K., Mahich, S., & Mathur, N. (2021). A comparative study of endoscopic assisted versus conventional middle ear and mastoid surgery at a tertiary care teaching hospital. International Journal of Otorhinolaryngology and Head and Neck Surgery, 8(1), 21–25. https://doi.org/10.18203/issn.2454-5929.ijohns20214823