@article{AA_2018_30_2_a8,
     author = {B. A. Plamenevskiǐ and A. S. Poretskiǐ},
     title = {On the behavior of waveguide scattering matrices near thresholds},
     journal = {Algebra i analiz},
     pages = {188--237},
     publisher = {mathdoc},
     volume = {30},
     number = {2},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2018_30_2_a8/}
}