Goolaerts A., Mattielli N., de Jong J., Weis D. and Scoates J.S. 2004. Hf and Lu isotopic reference values for the zircon standard 91500 by MC-ICP-MS. Chemical Geology, 206, 1-2 pp 1-9.
Pacific Centre for Isotopic and Geochemical Research
Department of Earth, Ocean and Atmospheric Sciences,The University of British Columbia