Lokwani, M. S., J. Patidar, and V. Parihar. “Anatomical Variations of Sphenoid Sinus on Multi-Detector Computed Tomography and Its Usefulness in Trans-Sphenoidal Endoscopic Skull Base Surgery”. International Journal of Research in Medical Sciences, vol. 6, no. 9, Aug. 2018, pp. 3063-71, doi:10.18203/2320-6012.ijrms20183645.