Aerosol filtration efficiency of household materials for homemade face masks :   influence of material properties, particle size, particle electrical charge, face velocity, and leaks / 
Frank Drewnick [and five others] 
<br/><br/>Aerosol Science and Technology, 2021 55 (1) pages 63–79 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Masks--standards
<br/><br/><label>Subjects--Index Terms: </label>Face Masks