@article{DAN_1995_343_1_a4,
     author = {E. M. Landis and A. I. Ibragimov},
     title = {Neumann problems in unbounded domains},
     journal = {Doklady Akademii Nauk},
     pages = {17--18},
     publisher = {mathdoc},
     volume = {343},
     number = {1},
     year = {1995},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_343_1_a4/}
}