Harish Kumar and  Hussein Yahia and  Oriol Pont and  Michel Haissaguerre and  Nicolas Derval and  Meleze Hocini,  Analysis of Heart Beat Dynamics through Singularity Spectrum.   journal   = {International Journal of Biomedical and Biological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2011, vol. 57(9). 407 - 412
    [viewed 20 January 2020]. Available from: https://publications.waset.org/pdf/1946.