1. Eykhoff, P., “System Identification”, Wiley-Interscience, 1974
2. Paul M. Frank, “Introduction to System Sensitivity Theory”, 1978
3. Graybill, “Introduction to Matrices with Application in Statistics”
4. Menahem Sidar, “Recursive Identification and Tracking of Parameter for Linear and Nonlinear System”, Int. J. Control, Vol. 24, No. 3, pp. 361–378, 1976
5. M. R. Matausek and S. S. Stanknvic, “Robust Real-Time Algorithm for Identification of Nonlinear Time-Varying System”, Int. J. Control, Vol. 31, No. 1, 79–94, 1980