@article{MZM_1975_18_5_a13,
     author = {K. L. Olifirov},
     title = {Bounds for the spectral abscissa of an element in {a~Banach} algebra},
     journal = {Matemati\v{c}eskie zametki},
     pages = {775--780},
     publisher = {mathdoc},
     volume = {18},
     number = {5},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1975_18_5_a13/}
}