A. W. JASINSKI. Activity diagrams for the MgO-Na2O-K2O-SiO2-AI2O3-H2O-HCI system in the temperature range 298 to 623 K and L bar pressure: application to the 1900 Ma phlogopite-Mg-chlorite-sericite schists of W. Bergslagen, Sweden. Netherlands Journal of Geosciences, p. 379-395, 1 Jan. 1988.