Zinszer, K., K. Morrison, J. S. Brownstein, F. Marinho, S. F. Alexandre, and E. O. Nsoesie. “Zika Virus Speed and Direction: Reconstructing Zika Introduction in Brazil”. Online Journal of Public Health Informatics, Vol. 9, no. 1, May 2017, doi:10.5210/ojphi.v9i1.7709.