Giancarlo Ruffo Rossano Schifanella FairPeers: Efficient Profit Sharing in Fair Peer-to-Peer Market Places. 355-382 2007 15 J. Network Syst. Manage. 3 http://dx.doi.org/10.1007/s10922-007-9066-9 db/journals/jnsm/jnsm15.html#RuffoS07