Peritumoural brain oedema in intracranial meningiomas: influence of tumour size, location and histology. - Bitzer,M.; Wöckel,L.; Morgalla,M.; Keller,C.; Friese,S.; Heiss,E.; Meyermann,R.; Grote,E.; Voigt,K. (Acta Neurochir (Wien), 1997)