title: [A game without rules: the impact factor system].
authors.forename: Walter
authors.initials: W
authors.lastname: Heindel
authors.forename: Gerhard
authors.initials: G
authors.lastname: Adam
authors.forename: Bernd
authors.initials: B
authors.lastname: Hamm
authors.forename: Hans H
authors.initials: HH
authors.lastname: Schild
authors.forename: Udo
authors.initials: U
authors.lastname: Schiller
mesh_terms: D015706:Bibliometrics; D005544:Forecasting; D005858:Germany; D006801:Humans; D055811:Journal Impact Factor; D010506:Periodicals as Topic / Q000145:classification / Q000592:standards* / Q000639:trends; D011643:Publishing / Q000592:standards / Q000639:trends; D011871:Radiology; D012106:Research