WASET
    D. G. Piliposyan,  Defect Modes in Multilayered Piezoelectric Structures.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 121(1). 106 - 114
    [viewed 18 April 2024]. Available from: https://publications.waset.org/pdf/10006224.