@inproceedings{FGG*12b,
  title = "{OPAL}: {A}utomated form understanding for the deep web",
  author = "Tim Furche and Georg Gottlob and Giovanni Grasso and Xiaonan Guo and Giorgio Orsi and Christian Schallhart",
  year = "2012",
  booktitle = "Proc. of the 21st World Wide Web Conf. (WWW)",
  pages = "829--838",
  url = "http://dl.acm.org/citation.cfm?doid=2187836.2187948",
  doi = "10.1145/2187836.2187948",
}