Charnay et al. (2020)
Also: Charnay et al. 2020
Is the Faint Young Sun Problem for Earth Solved?
Charnay, B., Wolf, E.T., Marty, B. & Forget, F. (2020). Is the Faint Young Sun Problem for Earth Solved?. Space Science Reviews. 216(5). PDF
https://doi.org/10.1007/s11214-020-00711-9
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.