@article{ZNSL_2022_514_a2,
     author = {Kh. D. Ikramov},
     title = {On a nontrivial situation with pseudounitary eigenvalues of a positive definite matrix},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {55--60},
     publisher = {mathdoc},
     volume = {514},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2022_514_a2/}
}