@article{ZVMMF_1994_34_11_a7,
     author = {P. A. Krutitskii},
     title = {Neumann's problem for the {Helmholtz} equation outside cuts in the plane},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1652--1665},
     publisher = {mathdoc},
     volume = {34},
     number = {11},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1994_34_11_a7/}
}