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\bibitem{NA48/2CollaborationBatley+Fiorini2019} NA48/2 Collaboration(Batley, J. R. et al), \& Fiorini, L. (2019). First observation and study of the K-+/- -> pi(+/-)pi(0)e(+)e(-) decay. \textit{Phys. Lett. B}, \textit{788}, 552--561.

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