@article{DAN_1973_213_2_a12,
     author = {V. I. Volkov and A. A. Dyachenko and O. E. Shushpanov},
     title = {Two-mode theory of filtering wave beam guide. {The} trajectory method},
     journal = {Doklady Akademii Nauk},
     pages = {299--302},
     publisher = {mathdoc},
     volume = {213},
     number = {2},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_213_2_a12/}
}