@article{AA_2016_28_2_a2,
     author = {F. L. Bakharev and S. G. Matveenko and S. A. Nazarov},
     title = {Discrete spectrum of x-shaped waveguide},
     journal = {Algebra i analiz},
     pages = {58--71},
     publisher = {mathdoc},
     volume = {28},
     number = {2},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2016_28_2_a2/}
}