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A.V. Dolbin, W.K. Maser, E.V. Bulakh, N.S. Mysko, V.V. Danchuk, R.M. Basnukaeva, N.A. Vinnikov, V.G. Manzhelii, V.G. Gavrilko, V.B. Esel`son, and A.M. Benito, Sorption of 4He, H2, Ne, N2, CH4, and Kr impurities in graphene oxide at low temperatures. Quantum effects, Low Temp. Phys. 39, (2013) [Fiz. Nizk. Temp. 39, 1397-1404, (2013)] DOI: https://doi.org/10.1063/1.4830421 .