Thimmappa, T. D., P. Amith, M. Nagaraj, K. N. Harsha, K. S. Gangadhar, and Abdul Azeem. 2017. “Anatomical Variations of Sinonasal Region: A CT Scan Study”. International Journal of Research in Medical Sciences 2 (4):1441-45. https://www.msjonline.org/index.php/ijrms/article/view/2438.