WASET
    Shaoquan Sun and  Qianqian Li,  Intuitionistic T-S Fuzzy Subalgebras and Ideals in BCI-algebras.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    October 2014, vol. 91(7). 1079 - 1083
    [viewed 18 April 2024]. Available from: https://publications.waset.org/pdf/9999676.