Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
3,450
Unknown
2,618
Skemman (Iceland)
2,521
Directory of Open Access Journals: DOAJ Articles
2,371
Hirsla - Landspítali University Hospital research archive
1,679
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1,659
ScienceDirect (Elsevier - via Crossref)
1,363
Opin vísindi (Iceland)
1,297
PubMed Central (PMC)
1,063
PANGAEA - Data Publisher for Earth & Environmental Science
1,054
Université de Nantes: HAL-UNIV-NANTES
951
Wiley Online Library (via Crossref)
905
Springer Nature (via Crossref)
768
Wiley Online Library
761
HighWire Press (Stanford University)
689
Informa (via Crossref)
642
Cambridge University Press
573
University of Copenhagen: Research
511
Institut national des sciences de l'Univers: HAL-INSU
478
Aarhus University: Research
459
Oxford University Press (via Crossref)
376
SAGE Publications (via Crossref)
336
Lund University Publications (LUP)
320
UNESDOC - UNESCO Digital Library
319
LeibnizOpen (The Leibniz Association)
316
MDPI Open Access Publishing
308
Zenodo
286
Copernicus Publications: E-Journals
279
ScienceDirect (Elsevier)
275
Hathi Trust Digital Library
261
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
247
norden (Nordic Council of Ministers): Publications (DiVA)
242
WikiBooks - Open-content textbooks
241
Defense Technical Information Center: DTIC Technical Reports database
234
HAL Sorbonne Université
224
University of Iceland: Peer Reviewed Journals
223
Informa
222
Apollo - University of Cambridge Repository
215
Yale University: EliScholar
215
Niedersächsisches Online-Archiv NOA
213
Oxford University Press
212
CESSDA DC Data Catalogue (Consortium of European Social Science Data Archives)
205
University of Southampton: e-Prints Soton
191
SAGE Publications
187
Uppsala University: Publications (DiVA)
184
Natural Environment Research Council: NERC Open Research Archive
183
University of Bergen: Bergen Open Research Archive (BORA-UiB)
172
University of North Texas: UNT Digital Library
171
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
170
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
161
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