Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
48,863
Directory of Open Access Journals: DOAJ Articles
2,521
University of Tromsø: Munin Open Research Archive
2,307
Unknown
2,261
Zenodo
1,607
PubMed Central (PMC)
933
Wiley Online Library (via Crossref)
834
LeibnizOpen (The Leibniz Association)
808
PANGAEA - Data Publisher for Earth & Environmental Science
762
NTNU Open Archive (Norwegian University of Science and Technology)
705
Wiley Online Library
699
Norwegian Institute for Nature Research: Brage NINA
666
Institute for Marine Research: Brage IMR
644
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
643
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
638
University of Bergen: Bergen Open Research Archive (BORA-UiB)
541
Open archive Norwegian University of Life Sciences: Brage NMBU
526
RePEc (Research Papers in Economics)
509
Cambridge University Press
502
Springer Nature (via Crossref)
499
Informa (via Crossref)
487
North Dakota State University (NDSU): Digital Horizons
474
HighWire Press (Stanford University)
424
ScienceDirect (Elsevier - via Crossref)
376
Université de Nantes: HAL-UNIV-NANTES
374
NGU Open Archive (Geological Survey of Norway)
352
UNESDOC - UNESCO Digital Library
342
Defense Technical Information Center: DTIC Technical Reports database
327
Copernicus Publications: E-Journals
325
Dryad Digital Repository (Duke University)
310
Aarhus University: Research
307
University of Tromsø: Septentrio Academic Publishing
299
David Rumsey Historical Map Collection (Cartography Associates)
289
ScienceDirect (Elsevier)
282
DataverseNO
260
MDPI Open Access Publishing
252
Arctic Council Repository
250
Niedersächsisches Online-Archiv NOA
248
University of Copenhagen: Research
243
University of Michigan: Digital Collections
241
SAGE Publications (via Crossref)
205
Institut national des sciences de l'Univers: HAL-INSU
196
CESSDA DC Data Catalogue (Consortium of European Social Science Data Archives)
195
norden (Nordic Council of Ministers): Publications (DiVA)
191
Oxford University Press (via Crossref)
185
Digital.CSIC (Spanish National Research Council)
183
Lund University Publications (LUP)
181
Open archive Nord universitet
171
Arctic Data Center (via DataONE)
165
da|ra - Registration agency for social and economic data
165
more ...