J. Sampe, F. F. Zulkifli, N. A. A. Semsudin, M. S. Islam, and B. Y. Majlis, “ULTRA LOW POWER HYBRID MICRO ENERGY HARVESTER USING RF, THERMAL AND VIBRATION FOR BIOMEDICAL DEVICES”, Int J Pharm Pharm Sci, vol. 8, no. 2, pp. 18–21, Sep. 2016.