[1] Sharma, N., Deepa, M., Varshney, P. and Agni-hotory, S. A., Influence of organic additives on the morphological, electrical, and electrochromic properties of sol-gel derived WO3 coatings, J. Sol-Gel Sci. &Technol., 18,167-173 (2000).
[2] Varshney, P.K., Nidhi, Ramachandran, R. and Agnihotory, S. A., Colloidal tungstic oxide films for electrochromic applications: preliminary studies Ind. J. Pure & Appl. Phys., 37, 262-265 (1999).
[3] Nishide, T., Mizkani, F., Crystal structures and optical properties of tungsten oxide films prepared by a complexing-agent-assisted sol-gel process, Thin Solid Films, 259, 212-217 (1995).
[4] Renard, Y.V., Leveque, G., Abdellaoui, A. and D Donnadieu, A., Optical constants of electrochromic polycrystalline WO3 thin films prepared by chemical vapor deposition, Thin Solid Films, 203, 33-39 (1991).
[5] Keneko, H., and Miyake, K., Estimation of the composition parameter of electrochemically colored amorphous hydrogen tungsten oxide films, J. Appl. Phys., 66, 845-850 (1989).
[6] Lrftheriotis, G., Papaefthimiou, S., Yianoulis P. and Siokou A., Effect of tungsten oxidation states in the thermal coloration and bleaching of amorphous WO3 films, Thin Solid Films, 384, 298-306 (2001).
[7] Lee, K. D., Preparation and electrochromic properties of WO3 coating deposition by the sol-gel method, Sol. Energy Mater., 57, 21-30, (1999).
[8] Ramachandran, R., Nidhi, Paradeep, S. A. and Agnihotory, S. A., Sol-gel deposition of EC-WO3 films using a precursor with enhanced stability, Ind. J. Pure & Appl. Phys., 37, 353-355 (1999).
[9] Yamanaka, K., Oakamoto, H., Kidou, H., Peroxo-tungstic acid coated films for electrochromic display devises, Jpn. J. Appl. Phys., 25 (9), 1420-1426, (1986).
[10] Joint Committee on Powder Diffraction Standard, Powder Diffraction File, PA. Swarthmore. (1972). Card Nos. 2-310, 5-363,
[11] Lee, K. D., Deposition of WO3 thin films by the sol-gel method , Thin Solid Films, 302, 84-88, (1997).