1. Agrafioti, F., Gao, J., Hatzinakos, D.: Heart biometrics: theory, methods and applications. In: Yang, J., (ed.) Biometrics: Book 3, Intech, pp. 199–216 (2011)
2. Alivecor.
http://www.alivecor.com/home
. Accessed Jan 2014
3. Bolle, R., Connell, J., Pankanti, S., et al.: Guide to Biometrics. Springer, New York (2004)
4. Boulanov, O.R., Gavrilova, M.L., Poursaberi, A., et al.: Biometric-based intelligent agent systems. IADIS Int. Conf. Intell. Syst. Agents, Rome, Italy 24–26, 162–164 (2011)
5. Burdea, G.C., Coiffet, P.: Virtual Reality Technology, 2nd edn. Wiley, New York (2004)