Hossein Pourali,  Zero Divisor Graph of a Poset with Respect to Primal Ideals.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2017, vol. 128(8). 375 - 379
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/10007698.