Wadhwa, S., N. Sharma, U. Garg, and P. Dutta. “Concha Bullosa: Types and Relationship With Chronic Sinusitis”. International Journal of Otorhinolaryngology and Head and Neck Surgery, vol. 3, no. 3, June 2017, pp. 482-5, doi:10.18203/issn.2454-5929.ijohns20172651.