Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,814
Directory of Open Access Journals: DOAJ Articles
1,444
Frontiers: Figshare
1,087
Unknown
697
Springer Nature (via Crossref)
611
ScienceDirect (Elsevier - via Crossref)
588
Frontiers (Publisher)
486
PubMed Central (PMC)
457
Oxford University Press
449
Wiley Online Library (via Crossref)
274
eCite UTAS (University of Tasmania)
247
University of California: eScholarship
199
Oxford University Press (via Crossref)
186
Wiley Online Library
159
University of Liège: ORBi (Open Repository and Bibliography)
135
ASM Journals (American Society for Microbiology - via Crossref)
119
ASM Journals (American Society for Microbiology)
94
Canadian Science Publishing (via Crossref)
94
Canadian Science Publishing
51
KovsieScholar Repository (University of the Free State - UFS UV)
46
JSTOR (via Crossref)
45
Defense Technical Information Center: DTIC Technical Reports database
42
Informa (via Crossref)
31
ScienceDirect (Elsevier)
29
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
28
The Royal Society: Figshare
28
Uppsala University: Publications (DiVA)
24
The University of Queensland: UQ eSpace
23
Mary Ann Liebert, Inc., publishers (via Crossref)
22
Informa
17
University of Technology Sydney: OPUS - Open Publications of UTS Scholars
17
Umeå University: Publications (DiVA)
15
IEDA: US Antarctic Program Data Center (via DataONE)
13
Lund University Publications (LUP)
13
OhioLINK: Electronic Theses and Dissertations Center
12
Opin vísindi (Iceland)
11
Johns Hopkins University Press
10
The University of Waikato: Research Commons
10
Chalmers University of Technology: Chalmers research
9
DRO - Deakin Research Online
9
Mary Ann Liebert, Inc., publishers
9
Ghent University Academic Bibliography
8
Institute of Hydrobiology, Chinese Academy of Sciences: IHB OpenIR
8
University of Alaska: ScholarWorks@UA
8
Old Dominion University: ODU Digital Commons
7
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
6
Imperial College London: Spiral
6
University of Tromsø: Munin Open Research Archive
6
University of Washington, Seattle: ResearchWorks
6
University of the Highlands and Islands: Research Database of UHI
6
more ...