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Sgouros, G.; Stabin, M.; Erdi, Y.; Akabani, G.; Kwok, C.; Brill, A. B.; Wessels, B. Medical Physics (2000)
Lief, E. P.; Lutz, W. R. Medical Physics (2000)
Fung, A. Y. C.; Zaider, M. Medical Physics (2000)
Mooij, R. B.; Amols, H. I. Medical Physics (2000)