Ruprecht, P. and Plank, T. Nature Volume: 50 p.: 68-72 (2013) doi:10.1038/nature12342[19] The Hf-Nd isotopic composition of marine sediments Vervoort, Jeff D.; Plank, Terry; Prytulak, Julie Geochimica Et Cosmochimica Acta 10/2011 Volume: 75 p.: 5903-5926 (2011)[20] New geothermometers for estimating slab surface temperatures Plank, T.; Cooper, L.; Manning; C.E. Nature Geoscience Volume: 2 p.: 611-615 (2009)[21]