Udaya Kumar Reddy K. R and  K. Viswanathan Iyer,  All-Pairs Shortest-Paths Problem for Unweighted Graphs in O(n2 log n) Time.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2009, vol. 26(2). 320 - 326
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/8870.