Liping Li and  Changchun Liu and  Ke Li and  Chengyu Liu,  Comparison of Detrending Methods in Spectral Analysis of Heart Rate Variability.   journal   = {International Journal of Biomedical and Biological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2011, vol. 57(9). 398 - 402
    [viewed 10 May 2024]. Available from: https://publications.waset.org/pdf/11956.