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Berger, A.; Loutre, M. F. (23. august 2002). «An Exceptionally Long Interglacial Ahead?». Science. 297 (5585): 1287–8. PMID12193773. doi:10.1126/science.1076120.
Archer, David; Ganopolski, Andrey (5. mai 2005). «A Movable Trigger Fossil Fuel CO2 and the Onset Of The Next Glaciation». Geochemistry, Geophysics, Geosystems. 6 (5): Q05003. Bibcode:2005GGG.....6.5003A. doi:10.1029/2004GC000891.
Augustin, L.; Barbante, Carlo; Barnes, Piers R. F.; Marc Barnola, Jean; Bigler, Matthias; Castellano, Emiliano; Cattani, Olivier; Chappellaz, Jerome; m.fl. (10. juni 2004). «Eight glacial cycles from an Antarctic ice core». Nature. 429 (6992): 623–8. Bibcode:2004Natur.429..623A. PMID15190344. doi:10.1038/nature02599.
Archer, David; Ganopolski, Andrey (5. mai 2005). «A Movable Trigger Fossil Fuel CO2 and the Onset Of The Next Glaciation». Geochemistry, Geophysics, Geosystems. 6 (5): Q05003. Bibcode:2005GGG.....6.5003A. doi:10.1029/2004GC000891.
Augustin, L.; Barbante, Carlo; Barnes, Piers R. F.; Marc Barnola, Jean; Bigler, Matthias; Castellano, Emiliano; Cattani, Olivier; Chappellaz, Jerome; m.fl. (10. juni 2004). «Eight glacial cycles from an Antarctic ice core». Nature. 429 (6992): 623–8. Bibcode:2004Natur.429..623A. PMID15190344. doi:10.1038/nature02599.
Berger, A.; Loutre, M. F. (23. august 2002). «An Exceptionally Long Interglacial Ahead?». Science. 297 (5585): 1287–8. PMID12193773. doi:10.1126/science.1076120.
«MacMillan to Seek Signs of New Ice Age. His Expedition Equipped for Polar Radio». The New York Times. 18. mai 1923. Besøkt 11. mars 2015. «Captain Donald B. MacMillan, who will sail from here June 16 on the little schooner Bowdoin to resume his arctic explorations, announced today that one purpose of the expedition is to determine whether there is beginning another ice age, as the advance of glaciers in the last seventy years would indicate. ...»