Johnstone, HJH, Yu, J, Elderfield, H and Schulz, M (2011) Improving temperature estimates derived from Mg/Ca of planktonic foraminifera using X-ray computed tomography-based dissolution index, XDX. Paleoceanography, 26. PA1215. doi:10.1029/2009PA001902
Yu, J, Elderfield, H and Hönisch, B (2007) B/Ca in planktonic foraminifera as a proxy for surface seawater pH. Paleoceanography, 22. PA2202. doi:10.1029/2006PA001347