1. V. Giurgiutiu, Structural Health Monitoring with Piezoelectric Wafer Active Sensors (Elsevier Academic, Oxford, 2014), 2nd ed.
2. M. Mitra and S. Gopalakrishnan, Smart. Mater. Struct. 25 (5), 053001 (2016).
3. X. Zhao, R. L. Royer, S. E. Owens, and J. L. Rose, Smart. Mater. Struct. 20 (10), 105002 (2011).
4. F. Li, H. Murayama, K. Kageyama, and T. Shirai, Sensors 9 (5), 4005–4021 (2009).
5. M. Liu, Z. Zeng, H. Xu, Z. Su, L. Zhou, and Z. Zhang, in Proc. 8th Eur. Workshop on Structural Health Monitoring (EWSHM 2016), (Bilbao, 2016).