About the Authors

Tony Ross-Hellauer

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Resources, Supervision, Validation, Writing – original draft, Writing – review & editing


Affiliation Know-Center GmbH, Graz, Austria

Arvid Deppe

Roles Data curation, Methodology, Project administration, Writing – review & editing

Affiliation Kassel University Library, University of Kassel, Kassel, Germany

Birgit Schmidt

Roles Conceptualization, Funding acquisition, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliation State and University Library Goettingen, University of Goettingen, Goettingen, Germany

Competing Interests

This work was conducted as part of the OpenAIRE2020 project, an EC-funded initiative to implement and monitor Open Access and Open Science policies in Europe and beyond. The lead author recently joined Know-Center GmbH, Graz, Austria. The Know-Center is funded within the Austrian COMET program—Competence Centers for Excellent Technologies – under the auspices of the Austrian Federal Ministry of Transport, Innovation and Technology, the Austrian Federal Ministry of Economy, Family and Youth, and the State of Styria. COMET is managed by the Austrian Research Promotion Agency FFG. This new commercial affiliation does not alter the authors’ adherence to PLOS ONE policies on sharing data and materials.