LI, W. Implementation of a Mobile-Based Surveillance System in Saudi Arabia for the 2009 Hajj. Online Journal of Public Health Informatics, [S. l.], v. 5, n. 1, 2013. DOI: 10.5210/ojphi.v5i1.4459. Disponível em: https://ojphi.org/ojs/index.php/ojphi/article/view/4459. Acesso em: 29 jan. 2022.