%0 Journal Article %A N. E. Tovmasyan %T Effective methods of solution of the Dirichlet problem for elliptic systems of second order differential equations with constant coefficients in regions bounded by an ellipse %J Differencialʹnye uravneniâ %D 1969 %P 60-71 %V 5 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1969_5_1_a2/ %G ru %F DE_1969_5_1_a2