Frei, R., Dahl, P., Frandsson, M., Jensen, L., Hansen, T., Terry, M., & Frei, K. (2009). Lead-isotope and trace-element geochemistry of Paleoproterozoic metasedimentary rocks in the Lead and Rochford basins (Black Hills, South Dakota, USA): Implications for genetic models, mineralization ages, and sources of leads in the Homestake gold deposit. Precambrian Research. https://doi.org/10.1016/J.PRECAMRES.2009.03.004
Frei, Robert, Peter Dahl, Mie Frandsson, Lizette Jensen, Thomas Hansen, Michael Terry, and Karin Frei. 2009. “Lead-Isotope and Trace-Element Geochemistry of Paleoproterozoic Metasedimentary Rocks in the Lead and Rochford Basins (Black Hills, South Dakota, USA): Implications for Genetic Models, Mineralization Ages, and Sources of Leads in the Homestake Gold Deposit”. Precambrian Research. https://doi.org/10.1016/J.PRECAMRES.2009.03.004.
Frei, R., P. Dahl, M. Frandsson, L. Jensen, T. Hansen, M. Terry, and K. Frei. Lead-Isotope and Trace-Element Geochemistry of Paleoproterozoic Metasedimentary Rocks in the Lead and Rochford Basins (Black Hills, South Dakota, USA): Implications for Genetic Models, Mineralization Ages, and Sources of Leads in the Homestake Gold Deposit. Precambrian Research, 1 July 2009, doi:10.1016/J.PRECAMRES.2009.03.004.