Content Provider
LeibnizOpen (The Leibniz Association)
21
University of California: eScholarship
6
Directory of Open Access Journals: DOAJ Articles
4
Unknown
4
Imperial College London: Spiral
3
Natural Environment Research Council: NERC Open Research Archive
2
University College London: UCL Discovery
2
University of Bristol: Bristol Research
2
University of Copenhagen: Research
2
AAAS Resource Center (American Association for the Advancement of Science)
1
Cambridge University Press
1
Columbia University: Academic Commons
1
DataCite Metadata Store (German National Library of Science and Technology)
1
Durham University: Durham Research Online
1
LaCRIS - University of Lapland Current Research System
1
Niedersächsisches Online-Archiv NOA
1
Northumbria University, Newcastle: Northumbria Research Link (NRL)
1
Publication Database PIK (Potsdam Institute for Climate Impact Research)
1
The University of Queensland: UQ eSpace
1
Universidad de Chile: Captura
1
University of Limerick: Institutional Repository (ULIR)
1
University of St Andrews: Research Portal
1
Utrecht University Repository
1
Wageningen UR (University & Research Centre): Digital Library
1