1. Control Theory;Glad,2000
2. Control System Design;Goodwin,2001
3. L. Hillström. Estimation of state and identification of complex modulus based on measurements on a bar traversed by waves. PhD thesis, Department of Materials Science, Uppsala University, 2001.
4. Estimation of the state vector and identification of the complex modulus of a beam;Hillström;Journal of Sound and Vibration,2003
5. Principles and Techniques of Vibration;Meirovitch,1997