WASET
    A. Hasankhani and  H. Saadat and  M. M. Zahedi,  Some Clopen Sets in the Uniform Topology on BCI-algebras.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    May 2007, vol. 5(5). 244 - 246
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/4851.