Local control of large primary brain tumors or metastasis treated by Leksell Gamma knife stereotactic radiosurgery: An analysis of dose-volume considerations, local control and complications - Ling,S.M.; Linzer,D.; Lu,J.; Raub,W.; Villalobos,H.; Ting,J.; Wu,X.; Landy,H.; Berti,A.; Markkoe,A.M. (J Radiosurg, 1999)