WASET
    R. Uthayakumar and  D. Easwaramoorthy,  Hutchinson-Barnsley Operator in Fuzzy Metric Spaces.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2011, vol. 56(8). 1418 - 1422
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10207.