Mufutau Ayinla Abdul-Yakeen ,  An Analysis of the Five Most Used Numerals and a Proposal for the Adoption of a Universally Acceptable Numeral (UAN).   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2017, vol. 127(7). 1961 - 1966
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/10008082.