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A. S. Bogolubskiy, A. S. Klepikova, A. B. Rinkevich, V. N. Neverov, O. V. Nemytova, M. S. Koroleva, I. V. Piir, and D. V. Perov, Dielectric and magnetic properties of holmium and ytterbium titanates, Low Temp. Phys. 47, (2020) [Fiz. Nizk. Temp. 47, 88-93, (2020)] DOI: https://doi.org/10.1063/10.0002902.