WASET
    Ramesh Rajagopalan and  Adam Dahlstrom,  A Pole Radius Varying Notch Filter with Transient Suppression for Electrocardiogram.   journal   = {International Journal of Electronics and Communication Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2014, vol. 87(3). 134 - 138
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/9997628.