@article{ELA_2007__16__a1,
     author = {Gil', Michael I.},
     title = {Estimates for absolute values of matrix functions},
     journal = {The electronic journal of linear algebra},
     pages = {444--450},
     publisher = {mathdoc},
     volume = {16},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2007__16__a1/}
}