@article{IM2_2015_79_1_a8,
     author = {J. Wu and D. Wang and J. Zhao},
     title = {Localization of eigenvalues and estimation of the spread for complex matrices},
     journal = {Izvestiya. Mathematics },
     pages = {208--215},
     publisher = {mathdoc},
     volume = {79},
     number = {1},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2015_79_1_a8/}
}