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 "Dulst, D. van (Dick)","Strictly singular quotient maps, non-pseudo-complemented subspaces and a problem concerning L^1(μ)-spaces",,"Department of Mathematics, University of Amsterdam",1973,Report,,,,https://cir.nii.ac.jp/crid/1130578580945274628