Singh, Amardeep, Manjunath Kameshwarachar, and Harbans Singh. 2022. “Assessment of Variations in Sphenoid Sinus Pneumatization in South Indian Population”. Bengal Journal of Otolaryngology and Head Neck Surgery 29 (3). Kolkata, India:279-84. https://doi.org/10.47210/bjohns.2021.v29i3.489.