Qiuyi Lyu and  Bin Gong,  Speedup Breadth-First Search by Graph Ordering.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2021, vol. 175(7). 428 - 435
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10012130.