Content Provider
Wiley Online Library (via Crossref)
2,066
ScienceDirect (Elsevier - via Crossref)
1,794
Directory of Open Access Journals: DOAJ Articles
1,336
PubMed Central (PMC)
1,274
Wiley Online Library
1,230
ScienceDirect (Elsevier)
1,079
Springer Nature (via Crossref)
859
Unknown
739
Institute for Marine Research: Brage IMR
570
DataCite Metadata Store (German National Library of Science and Technology)
568
Canadian Science Publishing (via Crossref)
552
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
509
eCite UTAS (University of Tasmania)
486
Open archive Norwegian University of Life Sciences: Brage NMBU
477
University of Stirling: Stirling Digital Research Repository
412
University of Bergen: Bergen Open Research Archive (BORA-UiB)
388
Université de Nantes: HAL-UNIV-NANTES
312
NTNU Open Archive (Norwegian University of Science and Technology)
305
Canadian Science Publishing
296
Nofima Knowledge Archive (Brage)
282
HighWire Press (Stanford University)
245
MDPI Open Access Publishing
241
University of Tromsø: Munin Open Research Archive
222
Technical University of Denmark: DTU Orbit
203
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
201
Natural Resources Institute Finland: Jukuri
178
Oxford University Press
178
BioMed Central
176
Oxford University Press (via Crossref)
159
Wageningen UR (University & Research Centre): Digital Library
159
HAL e2s UPPA (Université de Pau et des Pays de l'Adour)
154
University of Tasmania: UTas ePrints
137
University of the Highlands and Islands: Research Database of UHI
131
University of St Andrews: Research Portal
121
Cambridge University Press
115
Norwegian Institute for Nature Research: Brage NINA
111
Memorial University of Newfoundland: Research Repository
109
Ghent University Academic Bibliography
98
National Research Council Canada: NRC Publications Archive
92
Institute of Hydrobiology, Chinese Academy of Sciences: IHB OpenIR
89
Open archive Nord universitet
84
Informa (via Crossref)
83
PLOS
81
Institut National de la Recherche Agronomique: ProdINRA
80
Portail HAL Institut Agro
70
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
68
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
66
The University of Queensland: UQ eSpace
66
LeibnizOpen (The Leibniz Association)
65
Aberdeen University Research Archive (AURA)
63
more ...