Nadia Pisanti Maxime Crochemore Roberto Grossi Marie-France Sagot Bases of Motifs for Generating Repeated Patterns with Wild Cards. 40-50 2005 2 IEEE/ACM Trans. Comput. Biology Bioinform. 1 http://doi.acm.org/10.1145/1057651.1057657 db/journals/tcbb/tcbb2.html#PisantiCGS05