1. Stereotactic treatment of craniopharyngiomas;Backlund,1969
2. The history and development of radiosurgery;Backlund,1992
3. The stereotactic method of radiosurgery of the brain;Leksell;Acta Chir Scand,1951
4. Cerebral radiation surgery with narrow gamma beams: physical experiments;Sarby;Acta Radiol Ther Phys Biol,1974
5. Stereotaxis and radiosurgery: an operative system;Leksell,1971