Raczek, I., Stoll, B., Hofmann, A. W., & Jochum, K. P. (2001). High-precision trace element data for the USGS reference materials BCR-1, BCR-2, BHVO-1, BHVO-2, AGV-1, AGV-2, DTS-1, DTS-2, GSP-1 and GSP-2 by ID-TIMS and MIC-SSMS. Geostandards Newsletter, 25, 77-86.