db/journals/dpd/YiSWO00.html Xun Yi Chee Kheong Siew Xiao Feng Wang Eiji Okamoto A Secure Agent-based Framework for Internet Trading in Mobile Computing Environments. 85-117 2000 8 Distributed and Parallel Databases 1 db/journals/dpd/dpd8.html#YiSWO00 http://kapis.www.wkap.nl/oasis.htm/245308 DPD/8/P085.pdf