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\bibitem{Llosa_etal2016} Llosa, G., Trovato, M., Barrio, J., Etxebeste, A., Mu{\~n}oz, E., Lacasta, C., et al. (2016). First Images of a Three-layer compton Telescope prototype for Treatment Monitoring in hadron Therapy. \textit{Front. Oncol.}, \textit{6}, 14--6pp.

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