%0 Journal Article %A E. A. Volkov %T Grid Approximation of the First Derivatives of the Solution to the Dirichlet Problem for the Laplace Equation on a~Polygon %J Informatics and Automation %D 2006 %P 99-115 %V 255 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2006_255_a7/ %G ru %F TRSPY_2006_255_a7