WASET
    Susannah G. Fleming Lionel Tarassenko,  A Comparison of Signal Processing Techniques for the Extraction of Breathing Rate from the Photoplethysmogram.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2007, vol. 6(6). 366 - 370
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/13323.