著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL "Runggaldier, W. J. (Wolfgang J.) and Stettner, Lukasz",Approximations of discrete time partially observed control problems,,Giardini editori e stampatori in Pisa,1994,Applied mathematics monographs,,8842702676,,https://cir.nii.ac.jp/crid/1130282269924888064