Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
4,568
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
556
PANGAEA - Data Publisher for Earth & Environmental Science
535
University of Copenhagen: Research
429
Unknown
329
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
294
Aarhus University: Research
269
Cambridge University Press
258
Directory of Open Access Journals: DOAJ Articles
257
ScienceDirect (Elsevier - via Crossref)
232
Springer Nature (via Crossref)
130
Zenodo
100
Wiley Online Library (via Crossref)
99
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
96
Arctic Data Center (via DataONE)
90
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
88
GEUS Bulletin (Geological Survey of Denmark and Greenland)
84
Copernicus Publications: E-Journals
82
Technical University of Denmark: DTU Orbit
76
PubMed Central (PMC)
68
ScienceDirect (Elsevier)
68
Informa (via Crossref)
64
Apollo - University of Cambridge Repository
62
HighWire Press (Stanford University)
61
Natural Environment Research Council: NERC Open Research Archive
60
JSTOR (via Crossref)
59
Université de Nantes: HAL-UNIV-NANTES
52
Wiley Online Library
52
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
51
Defense Technical Information Center: DTIC Technical Reports database
51
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
48
University of Calgary Journal Hosting
47
University of Southampton: e-Prints Soton
47
Aarhus University: OJS at The State and University Library
40
Tidsskrift.dk (The Royal Library, Denmark)
40
Niedersächsisches Online-Archiv NOA
39
University of Bergen: Bergen Open Research Archive (BORA-UiB)
38
University of Tromsø: Munin Open Research Archive
36
Institut national des sciences de l'Univers: HAL-INSU
33
Geological Society of London: Figshare
30
Australian National University: ANU Digital Collections
29
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
29
Digital.CSIC (Spanish National Research Council)
27
University of Cambridge, Department of Earth Sciences: ESC Publications
27
Naval Postgraduate School: Calhoun
26
Lund University Publications (LUP)
24
Polar Research (E-Journal)
23
University of Michigan: Digital Collections
23
LeibnizOpen (The Leibniz Association)
21
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
20
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