Laxamana, J. Q., Gutierrez, R. L. C., & Claridad, R. C. (2013). Giant Ossifying Fibroma of the Frontoethmoid Sinus: A Silent Peril. Philippine Journal of Otolaryngology Head and Neck Surgery, 28(2), 22–25. https://doi.org/10.32412/pjohns.v28i2.479