Keshanagari, P., and R. Noel. “Primary and Secondary Atrophic Rhinitis: A Microbiological and Histopathological Study”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 3, no. 4, Sept. 2017, pp. 1077-80, doi:10.18203/issn.2454-5929.ijohns20174337.