@article{DAN_1972_203_1_a6,
     author = {B. D. Lyubachevskii},
     title = {The structure of a group of polynomial matrices unitary in an indefinite metric of index~$1$},
     journal = {Doklady Akademii Nauk},
     pages = {28--31},
     publisher = {mathdoc},
     volume = {203},
     number = {1},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_203_1_a6/}
}