%0 Journal Article %T Institute for Mathematical Modelling of Russian Academy of Sciences %J Matematičeskoe modelirovanie %D 1994 %P 97-112 %V 6 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM_1994_6_11_a10/ %G ru %F MM_1994_6_11_a10