Jian Tang and  Yunfei Yao,  Correspondence Theorem for Anti L-fuzzy Normal Subgroups.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2012, vol. 68(8). 806 - 808
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/5567.