When preparing the jisc collections data for ingestion into OpenAPC in September 2017, more than 8000 articles unfortunately had to be excluded since no DOI had been supplied for them. However, a closer investigation revealed that a significant share of those entries, while lacking persistent identifiers, did include the title of the article (about 3000).

The Leibniz Universität Hannover has provided its APC expenditures for the 2017 period.

The Open Access Publishing Fund of the Leibniz Association has updated its APC expenditures for the 2017 period.

The University of Veterinary Medicine Hannover, Foundation (TiHo) has reported its 2017 APC expenditures.

The University of Duisburg-Essen has updated its APC expenditures, the latest contribution provides data for the 2017 period.

The Eberhard Karls Universität Tübingen has updated its APC expenditures, the latest contribution provides data for the 2016 period.

The University of Bayreuth has updated its APC expenditures, the latest contribution provides data for the 2016 period.

The Carl von Ossietzky University of Oldenburg has updated its APC expenditures, providing additional data for the 2017 period.

The Carl von Ossietzky University of Oldenburg has updated its APC expenditures. The lastest contribution provides additional data for the 2017 period.