@article{DE_2004_40_9_a2,
     author = {P. A. Krutitskii and K. V. Prozorov},
     title = {A generalized jump problem for the {Helmholtz} equation outside cuts on the plane},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1176--1189},
     publisher = {mathdoc},
     volume = {40},
     number = {9},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2004_40_9_a2/}
}