Schulte et al. (2010)
Also: Schulte et al. 2010
The Chicxulub Asteroid Impact and Mass Extinction at the Cretaceous-Paleogene Boundary
Schulte, P., Alegret, L., Arenillas, I., Arz, J. A., Barton, P. J., Bown, P. R., ... & Collins, G. S. (2010). The Chicxulub asteroid impact and mass extinction at the Cretaceous-Paleogene boundary. Science, 327(5970), 1214-1218. Link to PDF
DOI: 10.1126/science.1177265
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.