Sammani Danwawu Abdullahi,  Exploring Counting Methods for the Vertices of Certain Polyhedra with Uncertainties.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2016, vol. 110(2). 64 - 67
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10003676.