A.N. Aleksandrovskii, V.G. Gavrilko, A.V. Dolbin, V.B. Esel`son, V.G. Manzhelii, and B.G. Udovidchenko, Thermal expansion of solid solutions Kr-CH₄ at temperatures of liquid helium, Low Temp. Phys. 29, (2003) [Fiz. Nizk. Temp. 29, 715-721, (2003)] DOI: https://doi.org/10.1063/1.1582338.