Albright Al

Incidence and management of subdural hematoma/hygroma with variable- and fixed-pressure differential valves: a randomized, controlled study of programmable compared with conventional valves.

P. Carmel, Ian F. Pollack, Harold L. Rekate, 1999 .

Intracranial ependymomas of childhood. Lack of correlation of histopathology and clinical outcome.

P. Gerszten, I. Pollack, J. Janosky, 1996, Pathology, research and practice.