1. Eykhoff, P.: System Identification, Parameter and State Estimation, (Wiley, New York 1974)
2. Moustafa, K.A.: ‘Studies on stochastic systems identifications’, 1978, Ph.D. dissertation, Kyoto University, Kyoto, Japan
3. Mendel, J.M.: Discrete Techniques of Parameter Estimation, (Marcel Dekker, New York 1973)