@article{ZNSL_2020_496_a5,
     author = {Kh. D. Ikramov},
     title = {Congruence of unitary matrices},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {94--96},
     publisher = {mathdoc},
     volume = {496},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2020_496_a5/}
}