Qianqian Li and Shaoquan Sun, Intuitionistic Fuzzy Implicative Ideals with Thresholds (λ,μ) of BCI-Algebras. journal = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology. January 2013, vol. 83(11). 1617 - 1621 [viewed 23 September 2024]. Available from: https://publications.waset.org/pdf/9997230.