Use of filters and special materials in classrooms, based on the assessment of the presence of CO2 as an indicator of Covid reduction and control in closed spaces = Uso de filtros y materiales especiales en aulas, basado en la evaluación de presencia de CO2 como indicador de reducción y control de Covid en espacios cerrados. Building & Management, [S. l.], v. 5, n. 3, p. 51–62, 2021. DOI: 10.20868/bma.2021.3.4714. Disponível em: https://polired.upm.es/index.php/building_management/article/view/4714. Acesso em: 18 apr. 2025.