@article{DAN_1978_242_3_a18,
     author = {M. V. Fedoryuk},
     title = {Wave propagation in periodic waveguides},
     journal = {Doklady Akademii Nauk},
     pages = {574--577},
     publisher = {mathdoc},
     volume = {242},
     number = {3},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_242_3_a18/}
}