@article{ZVMMF_1970_10_2_a7,
     author = {V. F. Lazutkin},
     title = {Eigenfunctions with a given caustic},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {362--373},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1970_10_2_a7/}
}