O. Märtens, T. Saar, M. Min, R. Land, and M. Reidla, “Fast Impedance Spectroscopy of Piezosensors for Structural Health Monitoring”, ELEKTRON ELEKTROTECH, vol. 103, no. 7, pp. 31–34, Aug. 2010, Accessed: Feb. 08, 2026. [Online]. Available: https://eejournal.ktu.lt/index.php/elt/article/view/9270