?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Istv%C3%A1n&rft.aulast=Gy%C5%91ri&rft.au=+Gy%C5%91ri+Istv%C3%A1n&rft.title=Rekeszrendszerek+struktur%C3%A1lis+identifik%C3%A1lhat%C3%B3s%C3%A1gi+probl%C3%A9m%C3%A1j%C3%A1nak+egy+algebrai+megk%C3%B6zel%C3%ADt%C3%A9se&rft.date=1981&rft.genre=proceeding