@article{UZKU_2006_148_3_a7,
     author = {E. K. Lipachev},
     title = {Dirichlet and {Neumann} boundary value problems for {Helmholtz} equation in unbounded domains with piecewise smooth part of boundary},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {94--108},
     publisher = {mathdoc},
     volume = {148},
     number = {3},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_2006_148_3_a7/}
}