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 "Braess, Dietrich",Nonlinear approximation theory,,Springer-Verlag,1986,Springer series in computational mathematics,,"3540136258,0387136258",,https://cir.nii.ac.jp/crid/1130282273070395648