@article{ZVMMF_1989_29_7_a4,
     author = {A. S. Il'inskii and M. V. Tupikov},
     title = {A new scheme of the projection method for studying circular corrugated waveguides},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1012--1022},
     year = {1989},
     volume = {29},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1989_29_7_a4/}
}