1. Baba, K., 1975. In: Assessment of Geothermal Resources of Japan, ed. J. Suyama, K. Sumi, I. Takashima and K. Yuhara, Proc. United States-Japan Geological Surveys Panel Discussion on the Assessment of Geothermal Resources, Tokyo, Japan, 17 October 1975, Geological Survey of Japan, pp. 63–119.
2. Cataldi, R. and Squarci, P., 1978. Valutazione del potenziale geotermico in Italia con particolare riguardo alla Toscana centrale e meridionale. Proc. AEI Conf., 32, 1–8.
3. Muffler, L. J. P. and Cataldi, R, 1978. Methods for regional assessment of geothermal resources. Geothermics, 7(2–4), 53–89.
4. Nathenson, M. and Muffler, L. J. P., 1975. Geothermal resources in hydrothermal convection systems and conduction-dominated areas. In: Assessment of Geothermal Resources of the United States, ed. D. E. White and D. L. Williams, US Geol. Surv. Circ. No. 726, pp. 104–21.
5. Brook, C. A., Mariner, R. H., Mabbey, D. R, Swanson, J. R., Guffanti, M. and Muffler, L. J. P., 1979. Hydrothermal convection systems with reservoir temperatures ≥90°C. In: Assessment of Geothermal Resources of the United States—1978, ed. L. J. P. Muffler, US Geol. Surv. Circ. No. 790, pp. 18–85.