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, The effect of the noncentral impurity-matrix interaction upon the thermal expansion and polyamorphism of solid CO-C₆₀ solutions at low temperatures, Low Temp. Phys. 34, (2008) [Fiz. Nizk. Temp. 34, 592-598, (2008)] DOI: https://doi.org/10.1063/1.2920178.