Dolgushev, S.V. and Fomin, V.M. 2008. Helium enrichment of natural gas in non-steady diffusion-sorption processes in the bed of glass microspheres. Computational Continuum Mechanics. 1, 3 (Apr. 2008), 66–75. DOI:https://doi.org/10.7242/1999-6691/2008.1.3.28.