Bettina Fazzinga Sergio Flesca Andrea Tagarelli Salvatore Garruzzo Elio Masciari A wrapper generation system for PDF documents. 442-446 2008 SAC http://doi.acm.org/10.1145/1363686.1363793 conf/sac/2008 db/conf/sac/sac2008.html#FazzingaFTGM08