Reference
Benedek Gal, Ferenc Molnar, Aberra Mogessie, Dean M. Peterson (2011): Raman-spectroscopic investigations of fluid and melt inclusions from the South Kawishiwi Intrusion, Duluth Complex, Minnesota, U.S.A. - the role of gas rich late-magmatic hydrothermal fluids in the formation of Cu-Ni-PGE mineralization – Berichte der Geologischen Bundesanstalt – 87: 92 - 93.