1.
Guerra-Centeno D, Burmester-Ruiz L, Guerra-Burmester P, Guerra-Burmester D, Villatoro-Paz F. Voluntary and mandatory use of face mask by pedestrians in Guatemala City during the COVID-19 pandemic. CTS [Internet]. 26 de noviembre de 2020 [citado 21 de noviembre de 2024];7(3):477-82. Disponible en: https://revistas.usac.edu.gt/index.php/cytes/article/view/894