Media type: E-Article Title: Abelian Ward identity from the background field dependence of the effective action Contributor: Freire, Filipe [Author]; Wetterich, Christof [Author] Published: 1996 Published in: Physics letters ; 380(1996), 3/4, Seite 337-340 Language: English DOI: 10.1016/0370-2693(96)00513-8 Identifier: Origination: Footnote: Access State: Open Access