WASET
Ahamed, V. , Dhanasekaran, P. , Naseem, A. , Karthick, N. , Jaleel, T. , K.Joseph, P. (2008), 'Quantification of Heart Rate Variability: A Measure based on Unique Heart Rates', World Academy of Science, Engineering and Technology, Open Science Index 15, International Journal of Medical and Health Sciences, 2(3), 127 - 130.