Celso A. G. Santos and  Paula K. M. M. Freire,  Analysis of Precipitation Time Series of Urban Centers of Northeastern Brazil using Wavelet Transform.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2012, vol. 67(7). 405 - 410
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/9685.