1. Texas Instruments, From low power to no power, ti is the driving force behind today’s energy harvesting applications. retrieved 2015-02-22. URL http://www.ti.com/ww/en/apps/energy-harvesting/.
2. Digi-Key Corp., Powering microcontrollers with scavenged energy. retrieved 2015-02-22. URL http://www.digikey.com/es/articles/techzone/2012/aug/powering-microcontrollers-with-scavenged-energy.
3. Silicon Labs, Energy harvesting applications. retrieved 2015-02-22. URL http://www.silabs.com/applications/industrial/Pages/EnergyHarvesting.aspx.
4. W. E. Boyson, Albuquerque solar resource, sandia national laboratories, photovoltaic systems evaluation laboratory. retrieved 2015-02-22. URL http://energy.sandia.gov/download/21660.
5. NASA, Langley Research Center, Atmospheric science and data center: NASA surface meteorology and solar energy. retrieved 2015-02-22. URL https://eosweb.larc.nasa.gov/cgi-bin/sse/grid.cgi?email=skip@larc.nasa.gov.