Alberto Apostolico Matteo Comin Laxmi Parida Conservative extraction of over-represented extensible motifs. 9-18 2005 conf/ismb/2005 ISMB (Supplement of Bioinformatics) http://dx.doi.org/10.1093/bioinformatics/bti1051 db/conf/ismb/ismb2005.html#ApostolicoCP05