?url_ver=Z39.88-2004&rft_id=3035351&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Szak%C3%A1cs&rft.aufirst=N%C3%B3ra&rft.au=+Szak%C3%A1cs+N%C3%B3ra&rft.issue=3&rft.date=2016&rft.issn=0037-1912&rft.title=SEMIGROUP+FORUM&rft.atitle=On+the+graph+condition+regarding+the+F-inverse+cover+problem&rft.pages=551-558&rft.volume=92&rft.genre=article