Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
30,396
PANGAEA - Data Publisher for Earth & Environmental Science
8,956
Research Data Australia (Australian National Data Service - ANDS)
5,620
Directory of Open Access Journals: DOAJ Articles
5,568
Unknown
5,498
Zenodo
3,232
Natural Environment Research Council: NERC Open Research Archive
3,053
ScienceDirect (Elsevier - via Crossref)
2,960
Springer Nature (via Crossref)
2,783
National Institute of Polar Research Repository, Japan
2,736
Cambridge University Press
2,512
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
2,472
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
2,212
IEDA: Marine-Geo Digital Library (via DataONE)
1,917
PubMed Central (PMC)
1,707
eCite UTAS (University of Tasmania)
1,637
Université de Nantes: HAL-UNIV-NANTES
1,581
Wiley Online Library (via Crossref)
1,535
Copernicus Publications: E-Journals
1,506
Institut national des sciences de l'Univers: HAL-INSU
1,467
LeibnizOpen (The Leibniz Association)
1,351
AU Digital Research Archive (American University)
1,330
Wiley Online Library
1,273
Informa (via Crossref)
1,124
National Library of Australia: Digital Collections
1,088
David Rumsey Historical Map Collection (Cartography Associates)
1,046
Niedersächsisches Online-Archiv NOA
1,029
Biodiversity Heritage Library (BHL)
964
University of Tasmania: UTas ePrints
939
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
911
MDPI Open Access Publishing
905
Digital.CSIC (Spanish National Research Council)
840
University of California: eScholarship
810
NASA Technical Reports Server (NTRS)
757
ScienceDirect (Elsevier)
734
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
693
Australian National University: ANU Digital Collections
664
IEDA: US Antarctic Program Data Center (via DataONE)
647
Frontiers: Figshare
609
University of Canterbury, Christchurch: UC Research Repository
543
Université Grenoble Alpes: HAL
539
Ohio State University (OSU): Knowledge Bank
513
Dryad Digital Repository (Duke University)
467
Oxford University Press (via Crossref)
454
HAL Sorbonne Université
452
Defense Technical Information Center: DTIC Technical Reports database
436
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
433
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
418
Università degli Studi di Siena: USiena air
415
HighWire Press (Stanford University)
404
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