%0 Journal Article %A A. A. Arsen'ev %T On two mathematical models for description of a~beam of charged particles in gas %J Matematičeskoe modelirovanie %D 1989 %P 101-106 %V 1 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM_1989_1_9_a9/ %G ru %F MM_1989_1_9_a9