Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Naoki Kojima,Implementability by a canonical indirect mechanism of an optimal two-dimensional direct mechanism,Discussion paper series,,小樽 : 小樽商科大学グローカル戦略推進センター研究支援部門,2011-06,,141,1-9,https://cir.nii.ac.jp/crid/1520572360097442432,