%0 Journal Article %A L. A. Muravei %T Analytic continuation with respect to a parameter of the Green's functions of exterior boundary value problems for the two-dimensional Helmholtz equation. I %J Sbornik. Mathematics %D 1975 %P 373-402 %V 26 %N 3 %U http://geodesic.mathdoc.fr/item/SM_1975_26_3_a5/ %G en %F SM_1975_26_3_a5