R. Kariyattil, V. Govindaraju, R. S. Hamid, and M. Unnikrishnan, “Primary Extradural Meningioma Presenting as Frontal Sinusitis with Extensive Bony Changes : Case report”, Sultan Qaboos Univ Med J, vol. 14, no. 4, pp. 566–570, Nov. 2014.