@article{ZNSL_2021_504_a4,
     author = {Kh. D. Ikramov and A. M. Nazari},
     title = {Symplectic eigenvalues and singular values of symmetric matrices},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {61--69},
     publisher = {mathdoc},
     volume = {504},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2021_504_a4/}
}