Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
30,685
PANGAEA - Data Publisher for Earth & Environmental Science
9,066
Research Data Australia (Australian National Data Service - ANDS)
5,620
Directory of Open Access Journals: DOAJ Articles
5,568
Unknown
5,488
Zenodo
3,232
Natural Environment Research Council: NERC Open Research Archive
3,066
Springer Nature (via Crossref)
2,783
National Institute of Polar Research Repository, Japan
2,736
Wiley Online Library
2,673
Cambridge University Press
2,540
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
2,485
ScienceDirect (Elsevier - via Crossref)
2,481
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)
1,720
eCite UTAS (University of Tasmania)
1,637
Université de Nantes: HAL-UNIV-NANTES
1,581
Copernicus Publications: E-Journals
1,506
Institut national des sciences de l'Univers: HAL-INSU
1,481
LeibnizOpen (The Leibniz Association)
1,351
AU Digital Research Archive (American University)
1,330
ScienceDirect (Elsevier)
1,248
National Library of Australia: Digital Collections
1,088
Niedersächsisches Online-Archiv NOA
1,061
David Rumsey Historical Map Collection (Cartography Associates)
1,050
Informa (via Crossref)
974
Biodiversity Heritage Library (BHL)
965
University of Tasmania: UTas ePrints
939
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
912
MDPI Open Access Publishing
905
Digital.CSIC (Spanish National Research Council)
848
University of California: eScholarship
815
NASA Technical Reports Server (NTRS)
757
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
693
Australian National University: ANU Digital Collections
665
IEDA: US Antarctic Program Data Center (via DataONE)
647
Frontiers: Figshare
620
Université Grenoble Alpes: HAL
551
University of Canterbury, Christchurch: UC Research Repository
544
Ohio State University (OSU): Knowledge Bank
513
Dryad Digital Repository (Duke University)
467
HAL Sorbonne Université
462
Defense Technical Information Center: DTIC Technical Reports database
436
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
433
Università degli Studi di Siena: USiena air
420
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
418
Università degli Studi di Genova: CINECA IRIS
418
HighWire Press (Stanford University)
404
University of Michigan: Digital Collections
400
more ...