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\bibitem{Rivard_etal2010} Rivard, M. J., Granero, D., Perez-Calatayud, J., \& Ballester, F. (2010). Influence of photon energy spectra from brachytherapy sources on Monte Carlo simulations of kerma and dose rates in water and air. \textit{Med. Phys.}, \textit{37}(2), 869--876.

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