Geng, X., F. Gerges, G.G. Katul, E. Bou-Zeid, H. Nassif, and M.C. Boufadel. 2021. “Population Agglomeration Is a Harbinger of the Spatial Complexity of COVID-19”. Chemical Engineering Journal 420. doi:10.1016/j.cej.2020.127702.

Geng, X., G.G. Katul, F. Gerges, E. Bou-Zeid, H. Nassif, and M.C. Boufadel. 2021. “A Kernel-Modulated SIR Model for Covid-19 Contagious Spread from County to Continent”. Proceedings of the National Academy of Sciences of the United States of America 118. doi:10.1073/pnas.2023321118.