Hansen (2005)
Also: Hansen 2005
A slippery slope: How much global warming constitute "dangerous anthropogenic interference"?
Hansen, J.E. (2005). A slippery slope: How much global warming constitutes dangerous anthropogenic interference?. Climatic Change. 68(3),269-279. PDF
https://doi.org/10.1007/s10584-005-4135-0
References
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.