Akmal, M., M. W. A. Rashid, U. Azlan, and N. Azmi. “The Effects of Different Annealing Temperature and Number of Deposition Layers on the Crystallographic Properties of Potassium Sodium Niobate (KNN) Thin Films Synthesized by Sol-Gel Spin Coating Technique”. Journal of Advanced Manufacturing Technology (JAMT), vol. 11, no. 1, June 2017, pp. 91-102, https://ojsdemo.utem.edu.my/jamt/article/view/1232.