S.B. Feodosyev, I.A. Gospodarev, V.I. Grishaev, and E.S. Syrkin, Vibrational dynamical and thermodynamical characteristics of the superlattices based on the metal-hydrogen system, Low Temp. Phys. 29, (2003) [Fiz. Nizk. Temp. 29, 710-714, (2003)] DOI: https://doi.org/10.1063/1.1582337.