Katzoff (1986)
Also: Katzoff 1986
Mass extinction causes debated
Katzoff, J.A. (1986). Mass extinction causes debated. Eos, Transactions American Geophysical Union. 67(1),1. Article
https://doi.org/10.1029/eo067i001p00001-01
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.