@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", }