WASET
    P. Pongsumpun,  Local Stability Analysis of Age Structural Model for Herpes Zoster in Thailand.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2013, vol. 84(12). 1670 - 1676
    [viewed 05 May 2024]. Available from: https://publications.waset.org/pdf/9996694.