Rajat, Goel, PK Mandal, S Sengupta, and SP Bera. “Isolated Chondrosarcoma of Frontal Sinus”. Bangladesh Journal of Otorhinolaryngology 18, no. 1 (April 21, 2012): 81–83. Accessed November 30, 2021. https://banglajol.info/index.php/BJO/article/view/10425.