André Kempe Jean-Marc Champarnaud Franck Guingne Florent Nicart WFSM Auto-intersection and Join Algorithms. 120-131 2005 conf/fsmnlp/2005 FSMNLP http://dx.doi.org/10.1007/11780885_13 db/conf/fsmnlp/fsmnlp2005.html#KempeCGN05