Rehman, Y., and S. Alvi. “Effect of Nickel Wire Gauze on Coupling Factor, Conductance and Efficiency of PZT-Steel Unimorphs”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 26, no. 1, Mar. 2016, pp. 249-58, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/5366.