Lan, G. ., Khalifa, S. ., Hassan, M. ., & Hu, W. . (2015). Estimating Calorie Expenditure from Output Voltage of Piezoelectric Energy Harvester - an Experimental Feasibility Study. EAI Endorsed Transactions on Pervasive Health and Technology, 2(7), e4. https://doi.org/10.4108/eai.28-9-2015.2261453