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\bibitem{Gimenez-Alventosa_etal2021} Gimenez-Alventosa, V., Gimenez, V., \& Oliver, S. (2021). PenRed: An extensible and parallel Monte-Carlo framework for radiation transport based on PENELOPE. \textit{Comput. Phys. Commun.}, \textit{267}, 108065--12pp.

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