WASET
    Shin-Shin Kao and  Yuan-Kang Shih and  Hsun Su,  On Chvátal’s Conjecture for the Hamiltonicity of  1-Tough Graphs and Their Complements.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2018, vol. 133(1). 20 - 23
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/10009345.