1. Bauer, F. L.: Theory of norms. Technical Report No. CS 75, Computer Science Department Stanford University, 1967.
2. Householder, A. S.: Minimal matrix norms. Monatshefte für Mathematik63, 344–350 (1959)
3. —— The theory of matrices in numerical analysis. New York-Toronto-London: Blaisdell 1964.
4. —— Norms and the localization of roots of matrices. Bull. Amer. Math. Soc.74, 816–830 (1968).
5. Nirschl, N. E.: Applications of norms to eigenvalue localization theorems and field of values theorems in matrix theory. Doctoral Dissertation, University of Wisconsin, 1963.