@inproceedings{GKF*12,
  title = "OPAL: a passe-partout for web forms",
  author = "Xiaonan Guo and Jochen Kranzdorf and Tim Furche and Giovanni Grasso and Giorgio Orsi and Christian Schallhart",
  year = "2012",
  booktitle = "Proc. of the 21st World Wide Web Conf. (WWW Companion Volume)",
  note = "Demonstration",
  pages = "353--356",
  url = "http://dl.acm.org/citation.cfm?doid=2187980.2188047",
  doi = "10.1145/2187980.2188047",
}