WASET
    Hazem. A. Khorshed and  Mostafa A. El Gendy and  Amer. Abd El-Razik,  Fuzzy T-Neighborhood Groups Acting on Sets.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    February 2008, vol. 14(2). 140 - 144
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/1866.