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V.G. Prokhorov, V.P. Pashchenko, V.L. Svetchnikov, J.S. Park, J.B. Kim, Y.H. Hyun, S.Y. Park, Y.P. Lee, V.A. Komashko, G.G. Kaminsky, and V.A. Khokhlov, Nonclassical magnetic dynamics and negative exchange bias in Nd0.5Sr0.5MnO3 films, Low Temp. Phys. 33, (2007) [Fiz. Nizk. Temp. 33, 889-896, (2007)] DOI: https://doi.org/10.1063/1.2746841.