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Sturm, P.; Leuenberger, M.; Sirignano, C.; Neubert, R. E. M.; Meijer, H. A. J.; Langenfelds, R.; Brand, W. A.; Thojima, Y. (2004). Permeation of atmospheric gases through polymer O-rings used in flasks for air sampling. Journal of Geophysical Research: Atmospheres, 109(D4), pp. 1-9. American Geophysical Union 10.1029/2003JD004073
