@article{ZNSL_2022_513_a7,
     author = {V. I. Kopeiko},
     title = {On unitary nil $K_1$-groups},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {110--119},
     publisher = {mathdoc},
     volume = {513},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2022_513_a7/}
}