Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1960__10_3_a1, author = {Fiedler, Miroslav and Pt\'ak, Vlastimil}, title = {Some {Inequalities} for the {Spectrum} of a {Matrix}}, journal = {Mathematica slovaca}, pages = {148--166}, publisher = {mathdoc}, volume = {10}, number = {3}, year = {1960}, mrnumber = {0124334}, zbl = {0102.01601}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1960__10_3_a1/} }
Fiedler, Miroslav; Pták, Vlastimil. Some Inequalities for the Spectrum of a Matrix. Mathematica slovaca, Tome 10 (1960) no. 3, pp. 148-166. http://geodesic.mathdoc.fr/item/MASLO_1960__10_3_a1/