1. Direct sagittal computed tomography of the head;Ball;Radiology,1985
2. Upper aerodigestive tract and neck;Carter,1988
3. Paranasal sinuses, facial bones, skullbase, and nasopharynx;Carter,1988
4. MRI of head and neck;Carter,1988
5. Nasopharynx, infratemporal fossa and skull base;Curtin,1985