1. Arehart, G.B., Wood, C.P., Christensen, B.W., Browne, P.R.L., Foland, K.A., 1997, Timing of Volcanism and Geothermal Activity at Ngatamariki and Rotokawa, New Zealand. Proceedings of the 19th New Zealand Geothermal Workshop, pp. 117–122.
2. Plutonic lithics in ignimbrites of Taupo Volcanic Zone, New Zealand; Sources and conditions of crystallization;Brown;Chem. Geol.,1998
3. Browne, P.R.L., 1971. Petrological logs of drillholes, Broadlands Geothermal Field. Report 52 N.Z.G.S., DSIR, 87 pp.
4. Browne, P.R.L., 1984. Petrological reports, Cores from Rotokawa drillhole RK4. DSIR Internal Report, 9 pp.
5. Subsurface andesite lavas and plutonic rocks in the Rotokawa and Ngatamariki geothermal systems, Taupo Volcanic Zone, New Zealand;Browne;J. Volcanol. Geotherm. Res.,1992