@article{VMJ_2018_20_1_a5,
     author = {A. O. Vatulyan and V. O. Yurov},
     title = {On the properties of the dispersion set for an inhomogeneous cylindrical waveguide},
     journal = {Vladikavkazskij matemati\v{c}eskij \v{z}urnal},
     pages = {50--60},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMJ_2018_20_1_a5/}
}