Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
97,761
PANGAEA - Data Publisher for Earth & Environmental Science
17,664
Unknown
11,422
Directory of Open Access Journals: DOAJ Articles
10,022
Research Data Australia (Australian National Data Service - ANDS)
7,774
Springer Nature (via Crossref)
7,396
Natural Environment Research Council: NERC Open Research Archive
7,331
Zenodo
7,148
ScienceDirect (Elsevier - via Crossref)
6,307
Cambridge University Press
6,066
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
5,650
National Institute of Polar Research Repository, Japan
4,930
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
4,691
Ohio State University (OSU): Knowledge Bank
3,623
PubMed Central (PMC)
3,519
eCite UTAS (University of Tasmania)
3,347
Université de Nantes: HAL-UNIV-NANTES
3,311
Informa (via Crossref)
3,074
Wiley Online Library
3,026
Institut national des sciences de l'Univers: HAL-INSU
2,974
Wiley Online Library (via Crossref)
2,767
Copernicus Publications: E-Journals
2,655
LeibnizOpen (The Leibniz Association)
2,095
IEDA: Marine-Geo Digital Library (via DataONE)
2,085
ScienceDirect (Elsevier)
1,984
Niedersächsisches Online-Archiv NOA
1,840
NASA Technical Reports Server (NTRS)
1,723
Digital.CSIC (Spanish National Research Council)
1,687
University of Tasmania: UTas ePrints
1,671
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
1,527
Informa
1,508
University of California: eScholarship
1,429
MDPI Open Access Publishing
1,413
Biodiversity Heritage Library (BHL)
1,365
AU Digital Research Archive (American University)
1,349
National Library of Australia: Digital Collections
1,241
HAL Sorbonne Université
1,157
David Rumsey Historical Map Collection (Cartography Associates)
1,148
Frontiers: Figshare
1,091
Australian National University: ANU Digital Collections
1,048
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1,047
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
1,016
Oxford University Press (via Crossref)
978
Defense Technical Information Center: DTIC Technical Reports database
955
University of Southampton: e-Prints Soton
941
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
907
Université Grenoble Alpes: HAL
903
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
881
HighWire Press (Stanford University)
861
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
847
more ...