Bonsall, F. (1971). Numerical ranges of operators on normed spaces and of elements of normed algebras. Cambridge at the University Pr.
Chicago-viite (17. p.)Bonsall, F.F. Numerical Ranges of Operators on Normed Spaces and of Elements of Normed Algebras. London: Cambridge at the University Pr, 1971.
MLA-viite (9. p.)Bonsall, F.F. Numerical Ranges of Operators on Normed Spaces and of Elements of Normed Algebras. Cambridge at the University Pr, 1971.
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