1. P. Gahinet, A. Nemirovski, A.J. Laub, M. Chilali, MATLAB, LMI Control Toolbox, The Mathworks, Inc., 1995.
2. The Kalman Yakubovich Popov lemma in the behavioral context;van der Geest;Systems Control Lett.,1997
3. Efficient algorithm for matrix spectral factorization;Ježek;Automatica,1985
4. O. Kaneko, T. Fujii, Quadratic difference forms -discrete time case-, Proceedings of the Symposium on Mathematical Theory of Networks and Systems 98, 1998, pp. 241–244; Systems Control Lett., submitted.
5. A.V. Oppenheim, R.W. Schafer, Digital Signal Processing, Prentice-Hall, Englewood Cliffs, NJ, 1974.