The number of journals denied an impact factor for taking part in citation cartels has risen sharply this year, pushing up the total number of excluded journals.
The publisher Elsevier has disassociated itself from an article by a trade association it belongs to that condemns proposed open-access mandates in several US states.
The government would like to see more publishers take up schemes that waive open access publishing fees for researchers from universities that subscribe to its journals, a senior civil servant has said.