Salzmann, U, Dolan, AM, Haywood, AM, Chan, WL, Voss, J, Hill, DJ, Abe-Ouchi, A, Otto-Bliesner, BL, Bragg, FJ, Chandler, M, Contoux, C, Dowsett, HJ, Jost, A, Kamae, Y, Lohmann, G, Lunt, DJ, Pickering, SJ, Pound, MJ, Ramstein, G, Rosenbloom, NA, Sohl, L, Stepanek, C, Ueda, H and Zhang, Z (2013) Challenges in quantifying Pliocene terrestrial warming revealed by data–model discord. Nature Climate Change, 3(11). 969-974. doi:10.1038/NCLIMATE2008