S. P. Kozaitis and R. L. Kriner, Improved Approximation to the Derivative of a Digital Signal Using Wavelet Transforms for Crosstalk Analysis. journal = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology. April 2009, vol. 28(4). 799 - 804 [viewed 08 March 2021]. Available from: https://publications.waset.org/pdf/7940.