Luiz Antônio Pereira Neves João Marques de Carvalho Jacques Facon Flávio Bortolozzi A table-form extraction with artefact removal. 622-626 2007 conf/sac/2007 SAC http://doi.acm.org/10.1145/1244002.1244144 db/conf/sac/sac2007.html#NevesCFB07