1. ANCO Report (1985), Providing Structural Modules with Self-Integrity Monitoring, ANCO Engineers 1311.05
2. Chen, J.-C., Garba, J.A. (1986), Structural Damage Assessment Using a System Identification Technique, private communication
3. Cottin, N., Felgenhauer, H.-P., Natke, H.G. (1984), On the Parameter Identification of Elastomechanical Systems Using Input and Output Residuals, Ingenieur-Archiv 54, pp. 378–387
4. Cottin, N., Natke, h.G. (1986), On the Parameter Identification of Elastomechanical Systems Using Weighted Input ana Output Residuals, Ingenieur-Archiv 56, pp. 106–113
5. Kozin, F., Natke, H.G. (1986), System Identification Techniques, Structural Safety, Vol. 3, Nos. 3 N 4, pp. 269–316.