1. Ossification of subdural hematoma;Afra;J Neurosurg,1961
2. Sekkaika koumakujou kesshuno shujutsu keikennrei (in Japanese);Banno;Shujutsu,1970
3. Calcified subdural hematoma;Boyd;Hum Nerv Ment Dis,1943
4. Ossified epidural hematoma;Cambria,1985
5. Cyst formations of the skull;Chorobski;S G O,1934