R. Mahadasa, D. R. Goda, and P. Surarapu, “Innovations in Energy Harvesting Technologies for Wireless Sensor Networks: Towards Self-Powered Systems”, Asia Pac. j. energy environ., vol. 6, no. 2, pp. 101–112, Dec. 2019, doi: 10.18034/apjee.v6i2.727.