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\bibitem{Doring_etal2010} Doring, M., Oset, E., \& Meissner, U. G. (2010). Evaluation of the polarization observables I-S and I-C in the reaction gamma p -> pi(0)eta p. \textit{Eur. Phys. J. A}, \textit{46}(2), 315--323.

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