Matthews, S. J.; Jones, A. P.; Beard, A. D. (1994-10-01). "Buffering of melt oxygen fugacity by sulphur redox reactions in calc-alkaline magmas". Journal of the Geological Society. 151 (5): 815—823. doi:10.1144/gsjgs.151.5.0815.
Gardeweg, M. C.; Sparks, R. S. J.; Matthews, S. J. (1998-02-01). "Evolution of Lascar Volcano, Northern Chile". Journal of the Geological Society. 155 (1): 89—104. doi:10.1144/gsjgs.155.1.0089.