@article{SM_1975_26_3_a5,
     author = {L. A. Muravei},
     title = {Analytic continuation with respect to a~parameter of the {Green's} functions of exterior boundary value problems for the two-dimensional {Helmholtz} {equation.~I}},
     journal = {Sbornik. Mathematics},
     pages = {373--402},
     publisher = {mathdoc},
     volume = {26},
     number = {3},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1975_26_3_a5/}
}