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A. Ganshin, V. Grigor`ev, V. Maidanov, N. Mikhin, A. Penzev, A. Polev, E. Rudavskii, and A. Rybalko, Properties of solid 3He inclusions embedded in crystalline 4He matrix at ultralow temperatures: Low-Temperature Physics and Chemistry in Cryomatrice, Low Temp. Phys. 26, (2000) [Fiz. Nizk. Temp. 26, 884-888, (2000)] DOI: https://doi.org/10.1063/1.1312390.