1. http://en.wikipedia.org/wiki/Demographics_of_India.
2. Dima Litvik, Yaniv Zigel, “Fall detection of elderly through floor vibration and sound”, in 30th Annual International IEEE EMBS Conference, Vancouver, British Columbia, Canada, August, 2008.
3. Majd Alwan, Prabhu Jude Rajendran, Steve Kell, David Mack, Siddharth Dalal, “A Smart and Passive Floor- Vibration Based Fall Detector for Elderly”, in Proceedings ITTA’06,Damascus,Syria,Apr 2007.
4. Youngbum Lee, Student Member, IEEE, Jinkwon Kim, Muntak Son, and Myoungho Lee “Implementation of Accelerometer Sensor Module and Fall Detection Monitoring System based on Wireless Sensor Network”, Proceedings of the 29th Annual International Conference of the IEEE EMBSCité Internationale, Lyon, France August 23-26, 2007.
5. Husne Ara Rubaiyeat, Tae-Seong Kim, Md. Kamrul Hasan “Real-time recognition of daily human activities using a single tri-axial accelerometer”, Proceedings of the 2010 5th international conference on Embedded and Multimedia Computing .