%0 Journal Article %A V. M. Favorin %T Behavior of the Green function of the third exterior boundary value problem for the two-dimensional Helmholtz equation $\Delta u+k^2u=f$, as $k\to0$ %J Differencialʹnye uravneniâ %D 1979 %P 709-716 %V 15 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1979_15_4_a14/ %G ru %F DE_1979_15_4_a14