Content Provider
Wiley Online Library (via Crossref)
1,561
ScienceDirect (Elsevier - via Crossref)
1,272
Directory of Open Access Journals: DOAJ Articles
1,019
Wiley Online Library
903
PubMed Central (PMC)
824
ScienceDirect (Elsevier)
769
Springer Nature (via Crossref)
548
Canadian Science Publishing (via Crossref)
520
Unknown
487
DataCite Metadata Store (German National Library of Science and Technology)
364
eCite UTAS (University of Tasmania)
344
Institute for Marine Research: Brage IMR
336
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
335
Open archive Norwegian University of Life Sciences: Brage NMBU
312
University of Stirling: Stirling Digital Research Repository
306
Canadian Science Publishing
294
University of Bergen: Bergen Open Research Archive (BORA-UiB)
270
Université de Nantes: HAL-UNIV-NANTES
214
HighWire Press (Stanford University)
203
NTNU Open Archive (Norwegian University of Science and Technology)
189
MDPI Open Access Publishing
184
Technical University of Denmark: DTU Orbit
162
Nofima Knowledge Archive (Brage)
149
University of Tromsø: Munin Open Research Archive
146
Natural Resources Institute Finland: Jukuri
128
Oxford University Press
127
BioMed Central
121
Wageningen UR (University & Research Centre): Digital Library
118
University of Tasmania: UTas ePrints
112
Oxford University Press (via Crossref)
105
Cambridge University Press
99
Ghent University Academic Bibliography
99
HAL e2s UPPA (Université de Pau et des Pays de l'Adour)
96
University of St Andrews: Research Portal
94
Norwegian Institute for Nature Research: Brage NINA
91
Institute of Hydrobiology, Chinese Academy of Sciences: IHB OpenIR
90
University of the Highlands and Islands: Research Database of UHI
89
Memorial University of Newfoundland: Research Repository
86
Institut National de la Recherche Agronomique: ProdINRA
81
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
76
National Research Council Canada: NRC Publications Archive
74
Universidad de Chile: Repositorio académico
57
HELDA – University of Helsinki Open Repository
55
Informa (via Crossref)
51
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
51
PLOS
51
Portail HAL Institut Agro
51
Open archive Nord universitet
49
The University of Queensland: UQ eSpace
49
LAEI VL (Lithuanian Institute of Agrarian Economics Virtual Library)
48
more ...