P. Pongsumpun,  Dynamical Transmission Model of Chikungunya in Thailand.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2010, vol. 44(8). 1191 - 1195
    [viewed 22 February 2020]. Available from: https://publications.waset.org/pdf/5341.