WASET
    Mazhar B. Tayel and  Eslam I. AlSaba,  Poincaré Plot for Heart Rate Variability.   journal   = {International Journal of Biomedical and Biological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2015, vol. 105(9). 708 - 711
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10002615.