Fomenko, L., Lubenets, S., Natsik, V., Cassidy, D., Gadd, G., Moricca, S., & Sundqvist, B. (2005). Low temperature microhardness of Xe-intercalated fullerite C₆₀. ФІЗИКА НИЗЬКИХ ТЕМПЕРАТУР, 31(5), 596–601. https://doi.org/10.1063/1.1925374