LARICO, Y. C.; LÓPEZ, O. M. F. DESIGN OF A FACIAL PROTECTOR PROTOTYPE WITH AN ELECTRONIC MASK FOR THE PROTECTION OF COVID 19. SciELO Preprints, 2020. DOI: 10.1590/SciELOPreprints.248. Disponível em: https://preprints.scielo.org/index.php/scielo/preprint/view/248. Acesso em: 29 jan. 2023.