%0 Book %A proceedings of the 7th ACM conference on electronic commerce; sponsored by ACM'S special interest group on electronic commerce )SIGecom(: joan feigenbaum, john chuang, and david pennock editors %T Acm conference on electronic commerce )7th: 6002:Ann Arbor, michigan, usa( %U /book/103024777/Acm-conference-on-electronic-commerce-7th-6002A/