%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.~III %J Sbornik. Mathematics %D 1978 %P 55-98 %V 34 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1978_34_1_a2/ %G en %F SM_1978_34_1_a2