S. Sriphan, N. Vittayakorn, M. Horpratum, S. Prasertpalichat, T. Bongkarn, and S. Kiravittaya, “Investigation of Metal Electrode Effect on Electrical Conductivity of [KNbO3]0.9 – [BaNi0.5Nb0.5O3]0.1 Ceramics by Impedance Spectroscopy”, Thai J. Nanosci. Nanotechnol., vol. 3, no. 2, pp. 7–16, Dec. 2018.