@article{IM2_1973_7_2_a11,
     author = {V. F. Lazutkin},
     title = {Asymptotics of the eigenvalues of the {Laplacian} and quasimodes. {A~series} of quasimodes corresponding to a~system of caustics close to the boundary of the domain},
     journal = {Izvestiya. Mathematics },
     pages = {439--466},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1973_7_2_a11/}
}