?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=+Putnam+Calvin+Richard&rft.aufirst=Calvin+Richard&rft.aulast=Putnam&rft.issue=1-2&rft.atitle=Generalized+projections+for+hyponormal+and+subnormal+operators&rft.title=Acta+scientiarum+mathematicarum&rft.volume=53&rft.pages=187-190&rft.issn=0001-6969&rft.date=1989&rft.genre=article