Gustafson, K. E., & Rao, D. K. M. (1997). Numerical range: The field of values of linear operators and matrices. Springer.
Chicago Style aipamenaGustafson, Karl E., and Duggirala K. M. Rao. Numerical Range: The Field of Values of Linear Operators and Matrices. New York: Springer, 1997.
MLA aipamenaGustafson, Karl E., and Duggirala K. M. Rao. Numerical Range: The Field of Values of Linear Operators and Matrices. Springer, 1997.
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