Antonio Di Ferdinando Alberto Rosi Franco Zambonelli Ricardo Lent Erol Gelenbe A platform for pervasive combinatorial trading with opportunistic self-aggregation. 1-6 2008 WOWMOM http://dx.doi.org/10.1109/WOWMOM.2008.4594897 conf/wowmom/2008 db/conf/wowmom/wowmom2008.html#FerdinandoRZLG08