Sudheer, C. P., and T. D. Singh. “Assess the Outcome of Pre and Postoperative Bacterial Culture in Sinonasal Polyposis Cases under FESS”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 5, no. 2, Feb. 2019, pp. 373-6, doi:10.18203/issn.2454-5929.ijohns20190763.