?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=+Sz%C5%91kefalvi-Nagy+B%C3%A9la&rft.aulast=Sz%C5%91kefalvi-Nagy&rft.aufirst=B%C3%A9la&rft.volume=19&rft.issn=0001-6969&rft.title=Acta+scientiarum+mathematicarum&rft.pages=26-45&rft.atitle=Sur+les+contractions+de+l'espace+de+Hilbert+%3A+III.+A+la+m%C3%A9moire+de+J.+von+Neumann&rft.date=1958&rft.issue=1-2&rft.genre=article