NASA - National Aeronautics and Space Administration

Crouse, D. L., S. Philip, A. van Donkelaar, R. Martin, B. Jessiman, P. A. Peters, S. Weichenthal, J. R. Brook, B. Hubbell, and R. T. Burnett (2016), A new method to jointly estimate the mortality risk of long-term exposure to fine particulate matter and its components, Scientific Reports, 6, 18916, doi:10.1038/srep18916.