Title	Authors	Year
Effect on impurities in grain growth in cold ice sheets. Journal of Geophysical Research, 111/F01015.	Durand, G., J. Weiss, V. Lipenkov, J.M. Barnola, G. Krinner, F. Parrenin, B. Delmonte, C. Ritz, P. Duval, R. Röthlisberger u. M. Bigler	2006

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