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Zumbrunn, R.; Friedli, H. J.; Neftel, A.; Rauber, D. (1983). CO2 measurements with an infrared laser spectrometer on flask samples collected at Jungfraujoch high-altitude research station (3500 meters asl) and with light aircraft up to 8000 meters over Switzerland. Journal of Geophysical Research: Oceans, 88(C11), pp. 6853-6857. American Geophysical Union 10.1029/JC088iC11p06853
Neftel, A.; Oeschger, H.; Schwander, J.; Stauffer, B.; Zumbrunn, R. (1982). Ice core sample measurements give atmospheric CO2 content during the past 40,000 yr. Nature, 295(5846), pp. 220-223. Macmillan Journals Ltd. 10.1038/295220a0
Zumbrunn, R.; Neftel, A.; Oeschger, H. (1982). CO2 measurements on 1-cm3 ice samples with an IR laserspectrometer (IRLS) combined with a new dry extraction device. Earth and planetary science letters, 60(2), pp. 318-324. Elsevier 10.1016/0012-821X(82)90010-3
Oeschger, H.; Stauffer, B.; Neftel, A.; Schwander, J.; Zumbrunn, R. (1982). Atmospheric CO2 content in the past deduced from ice core analyses. Annals of glaciology, 3, pp. 227-232. International Glaciological Society 10.3189/S0260305500002822
