WASET
    Desmond B. Keenan and  Paul Grossman,  Adaptive Filtering of Heart Rate Signals for an Improved Measure of Cardiac Autonomic Control.   journal   = {International Journal of Biomedical and Biological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2008, vol. 19(7). 232 - 238
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/11142.