Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
2,373
Wiley Online Library (via Crossref)
1,651
ScienceDirect (Elsevier - via Crossref)
1,283
Directory of Open Access Journals: DOAJ Articles
1,028
Unknown
859
Wiley Online Library
859
PubMed Central (PMC)
824
ScienceDirect (Elsevier)
776
Springer Nature (via Crossref)
593
Canadian Science Publishing (via Crossref)
555
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
549
Frontiers: Figshare
364
Institute for Marine Research: Brage IMR
349
Open archive Norwegian University of Life Sciences: Brage NMBU
347
eCite UTAS (University of Tasmania)
344
Canadian Science Publishing
341
Université de Nantes: HAL-UNIV-NANTES
309
University of Stirling: Stirling Digital Research Repository
307
University of Bergen: Bergen Open Research Archive (BORA-UiB)
303
Norwegian Institute for Nature Research: Brage NINA
227
NTNU Open Archive (Norwegian University of Science and Technology)
223
University of Tromsø: Munin Open Research Archive
218
Zenodo
206
HighWire Press (Stanford University)
203
University of Massachusetts: ScholarWorks@UMass Amherst
190
MDPI Open Access Publishing
184
Technical University of Denmark: DTU Orbit
165
Natural Resources Institute Finland: Jukuri
155
University of Tasmania: UTas ePrints
153
HAL e2s UPPA (Université de Pau et des Pays de l'Adour)
152
Nofima Knowledge Archive (Brage)
152
Institut National de la Recherche Agronomique: ProdINRA
151
Frontiers (Publisher)
126
Wageningen UR (University & Research Centre): Digital Library
123
BioMed Central
121
Oxford University Press
121
Oxford University Press (via Crossref)
117
Repositorio Digital Conicyt RI 2.0 (Comisión Nacional de Investigación Científica y Tecnológica)
106
DRO - Deakin Research Online
100
Ghent University Academic Bibliography
100
Cambridge University Press
98
Universidad de Chile: Repositorio académico
95
University of St Andrews: Research Portal
95
Dryad Digital Repository (Duke University)
93
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
91
Institute of Hydrobiology, Chinese Academy of Sciences: IHB OpenIR
91
University of Glasgow: Enlighten - Publications
90
University of the Highlands and Islands: Research Database of UHI
89
Memorial University of Newfoundland: Research Repository
86
Irstea Publications et Bases documentaires (Irstea@doc/CemOA)
84
more ...