%0 Journal Article %A E. A. Volkov %T Differentiability properties of solutions of boundary value problems for the Laplace and Poisson equations on a~rectangle %J Informatics and Automation %D 1965 %P 89-112 %V 77 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1965_77_a6/ %G ru %F TRSPY_1965_77_a6