@article{DAN_1987_294_4_a18,
     author = {L. A. Rud and V. P. Shestopalov},
     title = {Waveguide angled bend {\textendash} a waveguide-type open resonator},
     journal = {Doklady Akademii Nauk},
     pages = {848--850},
     year = {1987},
     volume = {294},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_294_4_a18/}
}