WASET
    Youssef Chahir and  Messaoud Mostefai and  Salah Khodja,  OILU Tag: A Projective Invariant Fiducial System.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2021, vol. 177(9). 531 - 535
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10012229.