M. Mayr, K.H. Speidel, M. Knopp, W. Karle, T. Faestermann, et al.. Measurements of the g-factor ratio of the first 3$^-$ and 5$^-$ states in $^{40}$Ca and the lifetime of the 5$^-$ state.
Zeitschrift für Physik A, Springer-Verlag, 1987, 327, pp.157-161.
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