Content Provider
Directory of Open Access Journals: DOAJ Articles
8
University of Calgary Journal Hosting
6
Unknown
4
Niedersächsisches Online-Archiv NOA
3
Lund University Publications (LUP)
2
Max Planck Society: MPG.PuRe
2
Natural Environment Research Council: NERC Open Research Archive
2
Springer Nature (via Crossref)
2
University of Southampton: e-Prints Soton
2
Aarhus University: Research
1
Cambridge University Press
1
Digital.CSIC (Spanish National Research Council)
1
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
Polar Research
1
Sapienza Università di Roma: CINECA IRIS
1
ScienceDirect (Elsevier - via Crossref)
1
University College London: UCL Discovery
1
University of Copenhagen: Research
1
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
1