Küçükgünay, B., G. Eskiizmir, H. Halis Ünlü, A. Aslan, P. Bayındır, G. Yılmaz Ovalı, and B. Özyurt. “The Radiological Evaluation of Anatomical Variations of Frontal Recess in Normal Population and Cases With Frontal Rhinosinusitis”. ENT Updates, vol. 2, no. 2, Feb. 2012, doi:10.2399/jmu.2012002001.