@article{DE_2006_42_9_a2,
     author = {P. A. Krutitskii and V. V. Kolybasova},
     title = {The {Helmholtz} equation outside cuts on the plane with the {Dirichlet} condition and a third-kind boundary condition on opposite sides of the cuts},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1180--1193},
     publisher = {mathdoc},
     volume = {42},
     number = {9},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2006_42_9_a2/}
}