Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
15,710
Skemman (Iceland)
5,256
Unknown
3,623
Hirsla - Landspítali University Hospital research archive
2,737
DataCite
2,721
Directory of Open Access Journals: DOAJ Articles
2,671
OECD iLibrary (via Crossref)
2,431
Zenodo
2,323
Wiley Online Library
1,806
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1,749
Opin vísindi (Iceland)
1,625
the Digital Archaeological Record (via DataONE)
1,299
University of Iceland: Peer Reviewed Journals
1,266
RePEc (Research Papers in Economics)
1,200
ScienceDirect (Elsevier - via Crossref)
1,159
PubMed Central (PMC)
1,137
Springer Nature (via Crossref)
1,068
PANGAEA - Data Publisher for Earth & Environmental Science
1,059
Université de Nantes: HAL-UNIV-NANTES
1,009
OECD iLibrary
1,002
Cambridge University Press
778
HighWire Press (Stanford University)
691
Informa (via Crossref)
591
ScienceDirect (Elsevier)
558
Informa
549
University of Copenhagen: Research
540
Aarhus University: Research
508
Institut national des sciences de l'Univers: HAL-INSU
505
UNESDOC - UNESCO Digital Library
498
LeibnizOpen (The Leibniz Association)
460
Oxford University Press
454
WikiBooks - Open-content textbooks
424
Oxford University Press (via Crossref)
411
David Rumsey Historical Map Collection (Cartography Associates)
396
SAGE Publications
383
Arctic Council Repository
376
Hathi Trust Digital Library
364
Lund University Publications (LUP)
344
Copernicus Publications: E-Journals
310
Natural Environment Research Council: NERC Open Research Archive
309
MDPI Open Access Publishing
308
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
297
NOAA NCEI Environmental Data Archive (via DataONE)
296
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
291
University of Southampton: e-Prints Soton
285
North Dakota State University (NDSU): Digital Horizons
265
CESSDA DC Data Catalogue (Consortium of European Social Science Data Archives)
260
norden (Nordic Council of Ministers): Publications (DiVA)
249
Springer Nature
246
Frontiers: Figshare
244
more ...