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\bibitem{Oliver_etal2013} Oliver, J. F., Fuster-Garcia, E., Cabello, J., Tortajada, S., \& Rafecas, M. (2013). Application of Artificial Neural Network for Reducing Random Coincidences in PET. \textit{IEEE Trans. Nucl. Sci.}, \textit{60}(5), 3399--3409.

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