@techreport{oai:repository.dl.itc.u-tokyo.ac.jp:00042196,
 author = {Sekiguchi, Yohei},
 month = {Jan},
 note = {application/pdf, 本文フィルはリンク先を参照のこと},
 title = {A Characterization of the Plurality Rule},
 year = {2012}
}