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Edward J. Brook, James W.C. White, Annie S.M. Schilla, Michael L. Bender, Bruce Barnett, Jeffery P. Severinghaus, Kendrick C. Taylor, Richard B. Alley and Eric J. Steig, 2004. Timing of millennial-scale climate change at Siple Dome, West Antarctica , during the last glacial period. Quaternary Science Reviews, vol. 24 (12-13): 1333-1343