2020 Yes https://www.sciencedirect.com/science/article/abs/pii/S0013935120300955 Martins, Vânia Europe Exposure Study Modeling Students Carbon Monoxide (CO) Particulate Matter (PM) Home School Indoor/outdoor air Size-segregated particles Chemical elements Children exposure The pattern of PM mass size distribution was dependent on the location (home vs. school and indoor vs. outdoor). The presence of EC in PM0.25 and OC in PM0.25–0.5 was linked to traffic exhaust emissions. Generally, the concentrations of mineral and marine elements increased with increasing PM size, while for anthropogenic elements happened the opposite. In schools, the concentrations of mineral matter, anthropogenic elements and marine aerosol were higher than in homes. High mineral matter concentrations found in schools were related to the close proximity to busy roads and elevated human occupancy.