1. Bounds for the characteristic roots of a matrix;Barankin, Edward W.;Bull. Amer. Math. Soc.,1945
2. Bounds on characteristic values;Barankin, Edward W.;Bull. Amer. Math. Soc.,1948
3. Sur les racines d’une équation fondamentale;Bendixson, Ivar;Acta Math.,1902
4. Limits for the characteristic roots of a matrix;Brauer, Alfred;Duke Math. J.,1946
5. Limits for the characteristic roots of a matrix. II;Brauer, Alfred;Duke Math. J.,1947