1. http://www.itascacg.com/flac/overview.html
2. SIM900,
http://wm.sim.com/producten.aspx?id=1019
(accessed on: March 25, 2014)
3. EFCom GPRS/GSM Shield,
http://www.elecfreaks.com/wiki/index.php?title=EFCom_GPRS/GSM_Shield
(access on: March 25, 2014)
4. STM32F303VC, Analog and DSP with FPU ARM Cortex-M4 MCU with 256 Kbytes Flash, 72 MHz CPU, MPU, CCM, 12-bit ADC 5 MSPS, PGA, comparators,
http://www.st.com/web/en/catalog/mmc/FM141/SC1169/SS1576/LN1531/PF252054
(accessed on: March 25, 2014)
5. Hobbypower Kis3r33s Dc-dc 7-24v to 5v 3a Usb Power Converter Buck Module,
http://www.amazon.com/Hobbypower-Kis3r33s-Dc-dc-Converter-Module/dp/B00I04T3A6
(accessed on: March 25, 2014)