@article{GoettscheHinschWittwer2011,
  author    = {Joachim G{\"o}ttsche and Andreas Hinsch and Volker Wittwer},
  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},
  journal   = {Solar Energy Materials and Solar Cells. 31 (1993), H. 3},
  pages     = {415 -- 428},
  year      = {2011},
}