Val Martin, M., Honrath, R. E., Owen, R. C., Pfister, G., Fialho, P., & Barata, F. (2006). Significant enhancements of nitrogen oxides, black carbon, and ozone in the North Atlantic lower free troposphere resulting from North American boreal wildfires. Journal Of Geophysical Research-Atmospheres, 111, D23S60. doi:10.1029/2006JD007530