Tham khảo Thời_kỳ_ấm_Trung_cổ

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  2. http://ruby.fgcu.edu/courses/twimberley/EnviroPhilo/CookPalmer.pdf
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  4. http://ruby.fgcu.edu/courses/twimberley/EnviroPhilo/Glacial.pdf
  5. Diaz, Henry F.; Hughes, M. (1994). The Medieval warm period. Boston: Kluwer Academic Publishers. tr. 134. ISBN 0-7923-2842-6. 6.2 Evidence for a Medieval Warm Epoch 
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  9. Kazuyoshi Yamada và đồng nghiệp. “Late Holocene monsoonal-climate change inferred from lakes Ni-no-Megata and San-noMegata, northeastern Japan”. Quaternary international 220: 122–132.  ||ngày truy cập= cần |url= (trợ giúp) Bảo trì CS1: Định rõ "và đồng nghiệp" (link)
  10. 1 2 Mann, M. E.; Zhang, Z.; Rutherford, S.; Bradley, R. S.; Hughes, M. K.; Shindell, D.; Ammann, C.; Faluvegi, G.; Ni, F. (2009). “Global Signatures and Dynamical Origins of the Little Ice Age and Medieval Climate Anomaly”. Science 326 (5957): 1256. PMID 19965474. doi:10.1126/science.1177303
  11. Solomon, Susan Snell; Intergovernmental Panel on Climate Change (2007). “6.6 The Last 2,000 Years”. Climate change 2007: the physical science basis: contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge: Cambridge University Press for the Intergovernmental Panel on Climate Change. ISBN 0-521-70596-7
  12. Staff members at NOAA Paleoclimatology (ngày 19 tháng 5 năm 2000). The "Medieval Warm Period". A Paleo Perspective...on Global Warming. NOAA Paleoclimatology. 
  13. Folland, C.K.; Karl, T.R.; Christy, J.R.; Clarke, R.A.; Gruza, G.V.; Jouzel, J.; Mann, M.E.; Oerlemans, J.; Salinger, M.J. (2001). “2.3.3 Was there a "Little Ice Age" and a "Medieval Warm Period"?"”. Trong Houghton, P.J.; Ding, Y.; Griggs, D.J.; Noguer, M.; van der Linden; Dai, X.; Maskell, K.; Johnson, C.A. Working Group I: The Scientific Basis. Intergovernmental Panel on Climate Change Climate Change 2001. Cambridge, United Kingdom and New York, NY, USA: Cambridge University Press. tr. 881. ISBN 0521807670.  Đã định rõ hơn một tham số trong |editor1-first=|editor-first= (trợ giúp)
  14. Bradley, Raymond S. (2003). “Climate of the Last Millennium.” (PDF). Climate System Research Center. 
  15. Crowley, Thomas J.; Lowery, Thomas S. (2000). “How Warm Was the Medieval Warm Period?” (PDF). AMBIO: A Journal of the Human Environment 29 (1): 51–4. doi:10.1579/0044-7447-29.1.51
  16. Bradley, Raymond S.; Malcolm K., Hughes; Diaz, Henry F. (2003). “Climate in Medieval Time” (PDF). Science 302 (5644): 404–5. PMID 14563996. doi:10.1126/science.1090372
  17. Jones, P.D.; Mann, M.E. (2004). “Climate over past millennia” (PDF). Reviews of Geophysics 42 (RG2002): 1–42. doi:10.1029/2003RG000143

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