NASA - National Aeronautics and Space Administration

Hornbrook, R. S., J. Crawford, G. D. Edwards, O. Goyea, R. L. Mauldin, J. Olson, and C. A. Cantrell (2011), Measurements of tropospheric HO2 and RO2 by oxygen dilution modulation and chemical ionization mass spectrometry, Atmos. Meas. Tech., 4, 735-756, doi:10.5194/amt-4-735-2011.