@article{DE_2005_41_9_a0,
     author = {P. A. Krutitskii and V. V. Kolybasova},
     title = {A {Generalization} of the {Neumann} {Problem} for the {Helmholtz} {Equation} {Outside} {Cuts} on the {Plane}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1155--1165},
     publisher = {mathdoc},
     volume = {41},
     number = {9},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2005_41_9_a0/}
}