Martins-Filho, Paulo Ricardo, Ricardo Ruan Rocha Santana, Victor Santana Santos, and Lorena G. Barberia. “Poorer and More Densely Populated Regions Have Lower Vaccination Capability Against COVID-19”. EXCLI Journal 21 (March 21, 2022): 621–622. Accessed April 14, 2024. https://www.excli.de/index.php/excli/article/view/4798.