1. Beards, C.: 1995, Engineering Vibration Analysis with Application to Control Systems. Edward Arnold.
2. Callahan, J. and H. Baruh: 1995, ‘Active Control of Flexible Structures Using Segmented Piezoelectric Actuators’. In: Smart Structures and Materials, Vol. 2443. pp. 630–642.
3. Clark, R., W. Saunders, and G. Gibbs: 1998, Adaptive Structures. Wiley Interscience.
4. Ewings, D.: 1984, Modal Testing: Theory and Practice. Research Studies Press LTD.
5. Ewins, D. and J. Sidhu: 1982, ‘Modal Testing and the Linearity of Structures’. Mecanique Materiaux Electricite (389-390-391), 297–302.