@article{AA_1990_2_2_a3,
     author = {S. A. Nazarov and B. A. Plamenevskii},
     title = {Asymptotics of the spectrum of the {Neumann} problem in singularly degenerate thin {domains.~I}},
     journal = {Algebra i analiz},
     pages = {85--111},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1990_2_2_a3/}
}