Weis D., Kieffer B., Maerschalk C., Pretorius W., Barling J. High-precision Pb-Sr-Nd-Hf isotopic characterization of USGS BHVO-1 and BHVO-2 reference materials. Geochem. Geophys. Geosyst., 6, Q02002, doi: 10.1029/2004GC000852, 2005.
Weis D., Kieffer B., Maerschalk C., Pretorius W., Barling J. High-precision Pb-Sr-Nd-Hf isotopic characterization of USGS BHVO-1 and BHVO-2 reference materials. Geochem. Geophys. Geosyst., 6, Q02002, doi: 10.1029/2004GC000852, 2005.