@article{SM_2000_191_6_a2,
     author = {R. R. Gadyl'shin},
     title = {On the {Dirichlet} problem for the {Helmholtz} equation on the plane with boundary conditions on an almost closed curve},
     journal = {Sbornik. Mathematics},
     pages = {821--848},
     publisher = {mathdoc},
     volume = {191},
     number = {6},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2000_191_6_a2/}
}