Ioannis A. Vetsikas Alex Rogers Nicholas R. Jennings Pick-a-bundle: a novel bundling strategy for selling multiple items within online auctions. 1225-1226 2009 AAMAS (2) http://doi.acm.org/10.1145/1558109.1558224 conf/atal/2009-2 db/conf/atal/aamas2009-2.html#VetsikasRJ09