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\bibitem{Studen_etal2011} Studen, A., Chesi, E., Cindro, V., Clinthorne, N. H., Cochran, E., Grosicar, B., et al. (2011). A silicon PET probe. \textit{Nucl. Instrum. Methods Phys. Res. A}, \textit{648}, S255--S258.

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