Farshideh Einsele and  Rolf Ingold,  A Study of the Variability of Very Low Resolution Characters and the Feasibility of Their Discrimination Using Geometrical Features.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2007, vol. 6(6). 1820 - 1823
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/8565.