Fan Ye,  Validation of Visibility Data from Road Weather Information Systems by Comparing Three Data Resources: Case Study in Ohio.   journal   = {International Journal of Urban and Civil Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2017, vol. 123(3). 322 - 327
    [viewed 07 December 2019]. Available from: https://publications.waset.org/pdf/10006625.