Robust classification of rare queries using web knowledge.

Andrei Z. Broder Marcus Fontoura Evgeniy Gabrilovich Amruta Joshi Vanja Josifovski Tong Zhang Robust classification of rare queries using web knowledge. 231-238 2007 conf/sigir/2007 SIGIR http://doi.acm.org/10.1145/1277741.1277783 db/conf/sigir/sigir2007.html#BroderFGJJZ07