Higazi, S. F., D. H. Abdel-Hady, and S. A. Al-Oulfi. “Application of Spatial Regression Models to Income Poverty Ratios in Middle Delta Contiguous Counties in Egypt”. Pakistan Journal of Statistics and Operation Research, Vol. 9, no. 1, Feb. 2013, pp. 93-110, doi:10.18187/pjsor.v9i1.272.