T. N. Janakiraman and  J. Janet Lourds Rani,  Delay Preserving Substructures in Wireless Networks Using Edge Difference between a Graph and its Square Graph.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2008, vol. 18(6). 333 - 337
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/9283.