Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kado Jiro,Projective modules over simple regular rings,Osaka Journal of Mathematics,0030-6126,"Osaka University and Osaka City University, Departments of Mathematics",1979,16,2,405-412,https://cir.nii.ac.jp/crid/1390853649740065664,https://doi.org/10.18910/5144