%0 Journal Article %A T. N. Smirnova %T A model prorab machine and solution of problems with very sparse quantities %J Zapiski Nauchnykh Seminarov POMI %D 1978 %P 197-238 %V 80 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1978_80_a11/ %G ru %F ZNSL_1978_80_a11