Methodology of assessing the quality of mask filter elements for protection of people, and their vital functions in case of fireSergey Puzach, Dmitry Bachurin, Olga Romanova, Lyudmila Komarova and Svetlana RodionovaE3S Web Conf., 460 (2023) 10016DOI: https://doi.org/10.1051/e3sconf/202346010016