Henry Tan Tharam S. Dillon Fedja Hadzic Elizabeth Chang Razor: mining distance-constrained embedded subtrees. 8-13 2006 conf/icdm/2006w ICDM Workshops http://doi.ieeecomputersociety.org/10.1109/ICDMW.2006.138 db/conf/icdm/icdmw2006.html#TanDHC06