@article{MZM_2013_94_6_a13,
     author = {D. V. Baydyuk},
     title = {Description of {Scattering} {Matrices} of {Unitary} {Extensions} of {Isometric} {Operators} in {Pontryagin} {Space}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {940--943},
     publisher = {mathdoc},
     volume = {94},
     number = {6},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2013_94_6_a13/}
}