Shitian Liu and  Deqin Chen,  On the Fp-Normal Subgroups of Finite Groups.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2011, vol. 54(6). 865 - 870
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/12370.