@article{MZM_2009_85_5_a4,
     author = {V. V. Grushin},
     title = {Asymptotic {Behavior} of {Eigenvalues} of the {Laplace} {Operator} in {Thin} {Infinite} {Tubes}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {687--701},
     publisher = {mathdoc},
     volume = {85},
     number = {5},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2009_85_5_a4/}
}