Zhiyun Xin Jizhong Zhao Chihong Chi Jiaguang Sun Information Push-Delivery for User-Centered and Personalized Service. 594-602 2005 conf/fskd/2005-1 FSKD (1) http://dx.doi.org/10.1007/11539506_74 db/conf/fskd/fskd2005-1.html#XinZCS05