VÁCLAVÍK, J., KODEJŠKA, M., MOKRÝ, P. Wall-plug efficiency analysis of semi-active piezoelectric shunt damping systems. Journal of Vibration and Control. 2016, 22(11), 2582-2590. ISSN 1077-5463. E-ISSN 1741-2986. Available: https://doi.org/10.1177/1077546314548910.