Renne et al. (2013)
Also: Renne et al. 2013
Time scales of critical events around the Cretaceous-Paleogene boundary
Renne, P. R., Deino, A. L., Hilgen, F. J., Kuiper, K. F., Mark, D. F., Mitchell, W. S., ... & Smit, J. (2013). Time scales of critical events around the Cretaceous-Paleogene boundary. Science, 339(6120), 684-687. Link to PDF
DOI: 10.1126/science.1230492
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.