?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=B%C3%A9la&rft.au=+Sz%C5%91kefalvi-Nagy+B%C3%A9la&rft.aulast=Sz%C5%91kefalvi-Nagy&rft.atitle=Sur+les+contractions+de+l'espace+de+Hilbert+%3A+X.+Contractions+similaires+%C3%A0+des+transformations+unitaires+%3A+Hommage+%C3%A0+Monsieur+L.+Kalm%C3%A1r+%C3%A0+son+60i%C3%A8me+anniversaire&rft.title=Acta+scientiarum+mathematicarum&rft.issue=1-2&rft.pages=79-90&rft.issn=0001-6969&rft.volume=26&rft.date=1965&rft.genre=article