1. Computer-Aided Control System Design;Rosenbrock,1974
2. Ackermann, J. (1968). Zeitoptimale Mehrfach-Abtastregelsysteme. Preprints to IFAC-Symposium on Multivariable Control, Düsseldorf (F.R. Germany).
3. Kucera, V. (1974). Algebraic theory of discrete optimal control for multivariable systems. Kybernetika suplements to 10, 11 and 12.
4. Blessing, P., Baur, U. and Isermann, R. (1976). Identification of multivariable systems with recursive correlation, least squares parameter estimation and use of compensation techniques. IFAC-Symposium on Identification, Tbilisi (UdSSR).
5. Blessing, P. (1977). Parameter estimation of state-space models for multivariable systems with correlation analysis and method of least squares. IFAC-Symposium on Multivariable Technological Systems, Fredericton (Canada).