Yujun Zheng and Qin Song and Haihe Shi and and Jinyun Xue, Transportation Under the Threat of Influenza. journal = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology. September 2009, vol. 33(9). 2321 - 2325 [viewed 20 September 2024]. Available from: https://publications.waset.org/pdf/10122.