\input zb-basic \input zb-ioport \iteman{io-port 70813199} \itemau{Bae, Jung-Sook; Lee, Jae Yong; Kim, Byung-Chul; Ryu, Seungwan} \itemti{Next generation mobile service environment and evolution of context aware services} \itemso{EUC, 591-600 (2006).} \itemcc{} \itemut{} \itemli{doi:10.1007/11802167\_60} \end