1. Spectra and energy levels of rare earth ions in crystals;Dieke,1968
2. High-temperature spectral emittance of oxides of erbium, samarium, neodymium and ytterbium;Guazzoni;Appl Spectrosc,1972
3. Rare earth oxide TPV emitters;Nelson,1986
4. Thermophotovoltaic energy conversion with a novel rare earth oxide emitter;Parent,1986
5. Reappraisal of solid selective emitters;Chubb,1990