Jeong Hee Hwang Myung-Jin Lee Oh-Cheon Kwon Keun Ho Ryu Context-based Preference Analysis Method in Ubiquitous Commerce. 25-32 2005 conf/udm/2005 UDM http://doi.ieeecomputersociety.org/10.1109/UDM.2005.8 db/conf/udm/udm2005.html#HwangLKR05