1. Optical fiber point temperature sensor;Akhavan,1988
2. Fiber optic temperature sensor for use in a geothermal well;Angel,1986
3. Development of fiber optics sensors for temperature measurement and chemical analysis in geothermal wells;Angel;Geoth. Res. Counc. Trans.,1987
4. Optrodes: chemically selective fiber-optics sensors;Angel;Spectroscopy,1987
5. Dual-emission rare-earth temperature optrode;Angel,1990