Khajavi, Mehdi, et al. “Nasal and Paranasal Sinuses Anatomical Variations in Patients With and Without Chronic Rhinosinusitis”. Journal of Otorhinolaryngology and Facial Plastic Surgery, vol. 1, no. 1, Sept. 2015, pp. pp. 13-20, doi:10.22037/orlfps.v1i1.9389.