1. Abowd, G. D., Dey, A. K., Brown, P. J., Davies, N., Smith, M., & Steggles, P. (1999). Towards a better understanding of context and context-awareness. In H.-W. Gellersen (Ed.), Lecture notes in computer science-handheld and ubiquitous computing (Vol. 1707, pp. 304–307). Berlin/Heidelberg: Springer.
2. ACME Systems srl. (2014). About us. ACME Systems srl. January 1, 2014. http://foxlx.acmesystems.it/about_us. Accessed 4 Apr 2014.
3. Adafruit Learning Technologies. (2014). PIR motion sensor. Adafruit Learning Technologies. January 1, 2014. http://learn.adafruit.com/pir-passive-infrared-proximity-motion-sensor/. Accessed 6 Mar 2014.
4. Agilent Technologies. (2003a). Agilent ADCM-1670 CIF resolution CMOS camera module, UART output. Agilent Technologies. May 13, 2003. http://www.digchip.com/datasheets/parts/datasheet/021/ADCM-1670.php. Accessed 10 Apr 2014.
5. Agilent Technologies. (2003b). Agilent ADCM-1700-0000: Landscape CIF resolution CMOS camera module. Agilent Technologies. November 7, 2003. http://www.zhopper.narod.ru/mobile/adcm1700.pdf. Accessed 23 Mar 2014.