Liew Siaw Yee and  Tahir Ahmad,  Deduction of Fuzzy Autocatalytic Set to Omega Algebra and Transformation Semigroup.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    February 2010, vol. 38(2). 311 - 315
    [viewed 05 August 2020]. Available from: https://publications.waset.org/pdf/14570.