@article{ZNSL_2006_334_a7,
     author = {Kh. D. Ikramov},
     title = {On the coneigenvalues and singular values of a~complex square matrix},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {111--120},
     publisher = {mathdoc},
     volume = {334},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2006_334_a7/}
}