Yap, H. J., Sachlin, I. S., & Khaw, B. L. (2017). A rare sinonasal tumour with orbital manifestation: glomangiopericytoma. International Journal of Otorhinolaryngology and Head and Neck Surgery, 4(1), 256–259. https://doi.org/10.18203/issn.2454-5929.ijohns20175636