Snow, J. A., B. Heikes, H. Shen, D. W. O’Sullivan, A. Fried, and J. G. Walega (2007), Hydrogen peroxide, methyl hydroperoxide, and formaldehyde over North America and the North Atlantic, J. Geophys. Res., 112, D12S07, doi:10.1029/2006JD007746.