Balog, Krisztian Kraaij, Wessel and de Vries, Arjen P. and Clarke, Charles L. A. and Fuhr, Norbert and Kando, Noriko People search in the enterprise. SIGIR 916 2007 http://dblp.uni-trier.de/db/conf/sigir/sigir2007.html#Balog07 ACM conf/sigir/2007 978-1-59593-597-7