Thin Solid Films, Proceedings of the 3rd International Symposium on Transparent Oxide Thin films for Electronics and Optics. 445. pp. 304–308. ↑ Scott H. Brewer; Stefan Franzen (2002). "Indium Tin Oxide Plasma Frequency Dependence on Sheet Resistance and Surface Adlayers Determined by Reflectance FTIR Spectroscopy".