Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL "Toyooka, Yasuyuki and 刈屋, 武昭",An approach to upper bound problems for risks of the GLSE's,,"Institute of Economic Research, Hitotsubashi University",1983,Discussion paper series,,,,https://cir.nii.ac.jp/crid/1130282271701379968