?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=+Meduna+Alexander&rft.aulast=Meduna&rft.aufirst=Alexander&rft.volume=16&rft.issn=0324-721X&rft.title=Acta+cybernetica&rft.pages=385-397&rft.atitle=Two-way+metalinear+PC+grammar+systems+and+their+descriptional+complexity&rft.date=2004&rft.issue=3&rft.genre=article