1. Routing protocols in wireless sensor networks: A survey;Singh;International Journal of Computer Science and Engineering Survey (IJCSES),2010
2. Powercast Corporation Lifetime Power Wireless Sensor System http://www.powercastco.com/PDF/wireless-sensor-system.pdf 2012
3. Harvesting ambient environmental energy for wireless sensor networks: A survey;Zhou;Journal of Sensors,2014
4. Harvesting sensor nodes: Survey and implications;Sudevalayam;IEEE Communications Surveys and Tutorials,2011