%0 Journal Article %A E. A. Volkov %T On differential properties of solutions of the Laplace and Poisson equations on a~parellelepiped and efficient error estimates of the method of nets %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1969 %P 46-65 %V 105 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1969_105_a4/ %G ru %F TM_1969_105_a4