Debora Field Roberta Catizone WeiWei Cheng Alexiei Dingli Simon Worgan Lei Ye Yorick Wilks The senior companion: a semantic web dialogue system. 1383-1384 2009 AAMAS (2) http://doi.acm.org/10.1145/1558109.1558306 conf/atal/2009-2 db/conf/atal/aamas2009-2.html#FieldCCDWYW09