@article{GoettscheHinschWittwer1993,
  author    = {G{\"o}ttsche, Joachim and Hinsch, Andreas and Wittwer, Volker},
  title     = {Electrochromic mixed WO3-TiO2 thin films produced by sputtering and the sol-gel technique : a comparison / J. G{\"o}ttsche ; A. Hinsch ; V. Wittwer},
  series = {Solar Energy Materials and Solar Cells. 31 (1993), H. 3},
  journal   = {Solar Energy Materials and Solar Cells. 31 (1993), H. 3},
  isbn      = {0927-0248},
  pages     = {415 -- 428},
  year      = {1993},
  language  = {en}
}
@inproceedings{GoettscheHinschWittwer1992,
  author    = {G{\"o}ttsche, Joachim and Hinsch, Andreas and Wittwer, Volker},
  title     = {Electrochromic and optical properties of mixed WO3-TiO2 thin films produced by sputtering and the sol-gel technique},
  series = {Optical materials technology for energy efficiency and solar energy conversion XI: chromogenics for smart windows : 19 and 21 May 1992, Toulouse-Lab{\`e}ge. (SPIE proceedings series. 1728)},
  booktitle = {Optical materials technology for energy efficiency and solar energy conversion XI: chromogenics for smart windows : 19 and 21 May 1992, Toulouse-Lab{\`e}ge. (SPIE proceedings series. 1728)},
  editor    = {Hugo-Le Goff, Anne},
  publisher = {SPIE},
  address   = {Bellingham, Wash.},
  isbn      = {0-8194-0901-4},
  pages     = {13 -- 25},
  year      = {1992},
  language  = {en}
}