Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
19,911
PANGAEA - Data Publisher for Earth & Environmental Science
17,715
Directory of Open Access Journals: DOAJ Articles
9,835
Unknown
9,472
Springer Nature (via Crossref)
5,995
Cambridge University Press
5,842
ScienceDirect (Elsevier - via Crossref)
5,084
Wiley Online Library
4,292
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
4,272
National Institute of Polar Research Repository, Japan
4,111
PubMed Central (PMC)
3,519
Ohio State University (OSU): Knowledge Bank
3,410
eCite UTAS (University of Tasmania)
3,347
Université de Nantes: HAL-UNIV-NANTES
3,022
ScienceDirect (Elsevier)
2,946
Institut national des sciences de l'Univers: HAL-INSU
2,759
Informa (via Crossref)
2,662
Copernicus Publications: E-Journals
2,655
Natural Environment Research Council: NERC Open Research Archive
2,611
LeibnizOpen (The Leibniz Association)
1,990
Niedersächsisches Online-Archiv NOA
1,855
MDPI Open Access Publishing
1,413
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
1,400
Informa
1,321
University of Tasmania: UTas ePrints
1,264
HAL Sorbonne Université
1,114
Defense Technical Information Center: DTIC Technical Reports database
955
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
925
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
872
HighWire Press (Stanford University)
861
Digital.CSIC (Spanish National Research Council)
844
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
814
Université Grenoble Alpes: HAL
806
Wiley Online Library (via Crossref)
793
Zenodo
766
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
761
University of Canterbury, Christchurch: UC Research Repository
749
Università degli Studi di Genova: CINECA IRIS
695
University of Liège: ORBi (Open Repository and Bibliography)
690
Archives ouvertes de Paris-Saclay
665
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
645
Oxford University Press
628
University of Southampton: e-Prints Soton
627
Oxford University Press (via Crossref)
615
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
605
University of Bristol: Bristol Research
560
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
555
The University of Queensland: UQ eSpace
546
Biodiversity Heritage Library (BHL)
542
Macquarie University Research Portal
528
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