WASET
    Vinita V. Sondur and  Vilas B. Sondur and  Narasimha H. Ayachit,  Design of Digital Differentiator to Optimize Relative Error.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2008, vol. 17(5). 1491 - 1496
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/8513.