%0 Journal Article %A E. A. Volkov %T Effective estimates of the errors in solutions by the method of nets of boundary problems for the Laplace and Poisson equations on a~rectangle and on certain triangles %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1966 %P 55-85 %V 74 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1966_74_a4/ %G ru %F TM_1966_74_a4