WASET
    Khalid M. Aamir and  Mohammad A. Maud,  Efficient Spectral Analysis of Quasi Stationary Time Series .   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2007, vol. 2(2). 429 - 432
    [viewed 09 May 2024]. Available from: https://publications.waset.org/pdf/8476.