A.V. Dolbin, V.B. Esel`son, V.G. Gavrilko, V.G. Manzhelii, N.A. Vinnikov, ,G.E. Gadd, S. Moricca, D. Cassidy, and B. Sundqvist, Specific features of thermal expansion and polyamorphism in CH₄-C₆₀ solutions at low temperatures, Low Temp. Phys. 33, (2007) [Fiz. Nizk. Temp. 33, 1401-1405, (2007)] DOI: https://doi.org/10.1063/1.2807242.