ELA articles which reference this paper are

Chi-Kwong Li; Leiba Rodman
Shapes and computer generation of numerical ranges of Krein space operators,
Electron. J. Linear Algebra 3 (1998), 31-47.

Vladimir Bolotnikov; Chi-Kwong Li; Patrick R. Meade; Christian Mehl; Leiba Rodman
Shells of matrices in indefinite inner product spaces,
Electron. J. Linear Algebra 9 (2002), 67-92.

Natalia bebiano; Joao da Providencia; Ana Cristina Nata; Maria da Graca Pereira Soares
Krein spaces numerical ranges and their computer generation,
Electron. J. Linear Algebra 17 (2008), 192-208.

Hiroshi Nakazato; Natalia Bebiano; Joao da Providencia
The numerical range of linear operators on the 2-dimensiona/ Krein space,
Electron. J. Linear Algebra 22 (2011), 430-442.

Ivana M. Radojevic and Dragan S. Djordjevic
Quasihyponormal and strongly hyponormal matrices in inner product spaces.
Electron. J. Linear Algebra 23 (2012) pp. 1023-1039.