Einat Amitay David Carmel Adam Darlow Ronny Lempel Aya Soffer The connectivity sonar: detecting site functionality by structural patterns. 38-47 2003 conf/ht/2003 Hypertext http://doi.acm.org/10.1145/900051.900060 db/conf/ht/ht2003.html#AmitayCDLS03