@techreport{oai:repository.dl.itc.u-tokyo.ac.jp:00042814,
 author = {Matsushima, Hitoshi},
 month = {Jul},
 note = {application/pdf, 本文フィルはリンク先を参照のこと},
 title = {Price-Based Combinatorial Auction : Connectedness and Representative Valuations},
 year = {2011}
}