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Mageras, G. S.; Kutcher, G. J. Medical Physics Publishing (1998)
Ling, C. C.; Roy, J. N. Medical Physics Publishing (1995)
Leibel, S. A.; Kutcher, G. J.; Armstrong, J. G.; Zelefsky, M. J.; Harrison, L. B.; Burman, C. M.; Mohan, R.; Ling, C. C.; Fuks, Z. Medical Physics Publishing (1995)