Sizhong Zhou and  Bingyuan Pu,  [a, b]-Factors Excluding Some Specified Edges In Graphs.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2009, vol. 35(11). 1017 - 1019
    [viewed 06 May 2021]. Available from: https://publications.waset.org/pdf/3455.