Bence Kővári and  ZSolt Kertész,  Stroke Extraction and Approximation with Interpolating Lagrange Curves .   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    May 2007, vol. 5(5). 1214 - 1218
    [viewed 22 April 2021]. Available from: https://publications.waset.org/pdf/15884.