Nurdin,  The Vertex and Edge Irregular Total Labeling of an Amalgamation of Two Isomorphic Cycles.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 1063 - 1066
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/12814.