1. A comparison of geothermal with oil and gas well drilling costs;Augustine,2006
2. Enhanced Geothermal Systems Directional Well Costing;Baker,2012
3. Levelized costs of electricity and direct-use heat from enhanced geothermal systems;Beckers;J. Renew. Sustain. Energy,2014
4. A systematic review of enhanced (or engineered) geothermal systems: past, present and future;Breede;Geotherm. Energy,2013
5. The drilling performance curve: a yardstick for judging drilling performance;Brett;SPE,1986