Levin, I., Facklam, C., Schmidt, M. W. I., Ramonet, M., Ciais, P., Xueref, I., Langenfelds, R. L., Allison, C., Francey, R.,
Jordan, A., Rothe, M., Brand, W. A., Neubert, R. E. M., Meijer, H. A. J., Machida, T., & Mukai, H. (2004).
Results of inter-comparison programme for analysis of "sausage" flask air samples. In E., Commission (Ed.),
Special report. TACOS (Terrestrial and atmospheric carbon observing system infrastructure).
