M. Derayatifar and M. Packirisamy and R.B. Bhat, Functionally Graded MEMS Piezoelectric Energy Harvester with Magnetic Tip Mass. journal = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology. June 2018, vol. 137(5). 571 - 574 [viewed 20 September 2024]. Available from: https://publications.waset.org/pdf/10009255.