@article{DAN_1977_233_2_a16,
     author = {I. L. Verbitskii and N. Z. Remez},
     title = {On the theory of two-dimensional waveguide transitions},
     journal = {Doklady Akademii Nauk},
     pages = {323--326},
     publisher = {mathdoc},
     volume = {233},
     number = {2},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_233_2_a16/}
}