Khormi, H. M., L. Kumar, and R. A. Elzahrany. “Modeling Spatio-Temporal Risk Changes in the Incidence of Dengue Fever in Saudi Arabia: A Geographical Information System Case Study”. Geospatial Health, Vol. 6, no. 1, Nov. 2011, pp. 77-84, doi:10.4081/gh.2011.159.