V.G. Prokhorov, G.G. Kaminsky, J.M. Kim, Y.J. Yoo, Y.P. Lee, V.L. Svetchnikov, G.G. Levchenko, Yu.M. Nikolaenko, and V.A. Khokhlov, Evidence for Griffiths phase in multiferroic BiMnO₃ and BiFe_0.5Mn_0.5O₃ films, Low Temp. Phys. 38, (2012) [Fiz. Nizk. Temp. 38, 531-537, (2012)] DOI: https://doi.org/10.1063/1.4709440.