[1] Grifflth P R. Applied Spectroscopy, 1977, 31:497
[2] Platt U, Perner D. Simultaneous measurements of atmospheric CH2O, O3 and NO2 by differential optical absorption [J]. Geophys. Res, 1979, 84:6329-6335
[3] Noxon J F. Nitrogen doixide in the stratosphere and troposphere measurement by ground-based absorption spectroscopy [J]. Science, 1975, 189:547-549
[4] Axelsson H. Measurement of aromatic hydrocarbons with the DOAS technique [J]. Applied Spectroscopy, 1995,49:1254-1260
[5] Kourtides K, Ziomas I. Benzene and toluene levels measured with a commercial DOAS system in Thessaloniki,Greece [J]. Atmospheric Environment, 2000, 34:1471-1480
[6] Plane John M C, Chiafu N. Differential optical absorption spectrometer for measuring atmospheric trace gases [J]. Rev. Sci. Instrum, 1995, 63(3): 1867-1876