1. Heat transformer with self-circulation: design and preliminary operational data
2. S. Santoyo-Gutierrez, R.M. Barragan-Reyes, F.A. Holland, in: Proceedings Annual Congress of the Mexican Geothermal Association, September 9, Cerro Prieto, Mexico, vol. 14, 2006, pp. 61–75.
3. L. Rybach, in: Proceedings Renewable Energy 2006, 9–13 October, Chiba, Japan, 2006, pp. 1512–1515.
4. I.B. Fridleifsson, R. Bertani, E. Huenges, J.W. Lund, A. Ragnarsonn, L. Rybach, in: O. Hohmeyer, T. Tritin (Eds.), IPCC Scoping Meeting on Renewable Energy Sources Proceedings, Luebeck, Germany, 2008, pp. 59–80.
5. Developments in geothermal energy in Mexico—part thirty-six. The commissioning of a heat pump assisted brine purification system