F.A. Beck, T. Byrski, C. Gehringer, A.Z. Hrynkiewicz, J.C. Merdinger, et al.. Isomers in the n = 180 nuclei $^{140}$Nd and $^{142}Sm..
Structure of Medium-heavy Nuclei 1979, Crn Strasbourg, pp.289-, 1980, Institute Of Physics Conference Series.
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