WASET
    Puntani Pongsumpun and  I-Ming Tang,  Effect of the Seasonal Variation in the Extrinsic Incubation Period on the Long Term Behavior of the Dengue Hemorrhagic Fever Epidemic.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    October 2007, vol. 10(10). 483 - 489
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/7829.