%0 Journal Article %A V. Ya. Rivkind %T On an estimate of an error in approximate methods of calculation of viscous non-compressible flows with a~free boundary %J Zapiski Nauchnykh Seminarov POMI %D 1980 %P 247-254 %V 96 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1980_96_a23/ %G ru %F ZNSL_1980_96_a23