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\bibitem{Caballero_etal2010} Caballero, L., Rubio, B., Kleinheinz, P., Yates, S. W., Algora, A., Dewald, A., et al. (2010). Two-phonon octupole excitation in Gd-146. \textit{Phys. Rev. C}, \textit{81}(3), 031301--4pp.

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