Guerra-Centeno, Dennis, Luisa Burmester-Ruiz, Paula Guerra-Burmester, Dennis Guerra-Burmester, y Federico Villatoro-Paz. «Voluntary and Mandatory Use of Face Mask by Pedestrians in Guatemala City During the COVID-19 Pandemic». Ciencia, Tecnologí­a y Salud 7, no. 3 (noviembre 26, 2020): 477–482. Accedido abril 12, 2025. https://revistas.usac.edu.gt/index.php/cytes/article/view/894.