WASET
    V. I. Thajudin Ahamed and  P. Dhanasekaran and  A. Naseem and  N. G. Karthick and  T. K. Abdul Jaleel and  Paul K.Joseph,  Quantification of Heart Rate Variability: A Measure based on Unique Heart Rates.   journal   = {International Journal of Medical and Health Sciences}, [online]. World Academy of Science, Engineering and Technology.
    March 2008, vol. 15(3). 127 - 130
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10585.