Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,355
Directory of Open Access Journals: DOAJ Articles
1,205
Cambridge University Press
1,134
Unknown
472
Springer Nature (via Crossref)
400
DataCite
353
ScienceDirect (Elsevier - via Crossref)
194
Lund University Publications (LUP)
130
The Royal Society: Figshare
125
University of California: eScholarship
124
Arctic Data Center (via DataONE)
121
Oxford University Press (via Crossref)
103
UmeƄ University: Publications (DiVA)
102
Wiley Online Library (via Crossref)
86
Frontiers: Figshare
68
LeibnizOpen (The Leibniz Association)
65
Swedish University of Agricultural Sciences (SLU): Epsilon Open Archive
60
Wiley Online Library
58
ScienceDirect (Elsevier)
56
eCite UTAS (University of Tasmania)
49
De Gruyter (via Crossref)
45
Oxford University Press
45
Informa (via Crossref)
44
Defense Technical Information Center: DTIC Technical Reports database
38
University of Alaska: ScholarWorks@UA
34
JSTOR (via Crossref)
32
DRO - Deakin Research Online
28
SAGE Publications (via Crossref)
26
Uppsala University: Publications (DiVA)
25
PubMed Central (PMC)
24
Canadian Science Publishing (via Crossref)
21
SAGE Publications
21
Frontiers (Publisher)
18
University of California Press (via Crossref)
18
University of the Highlands and Islands: Research Database of UHI
18
Sciendo (de Gruyter - via CrossRef)
17
ASM Journals (American Society for Microbiology - via Crossref)
16
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
16
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
15
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
14
JSTOR
13
Northwest Institute of Plateau Biology: NWIPB OpenIR (Chinese Academy of Sciences)
12
York University, Toronto: YorkSpace
12
Columbia University: Academic Commons
11
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
11
SSOAR - Social Science Open Access Repository
11
Aberdeen University Research Archive (AURA)
10
Biodiversity Heritage Library (BHL)
10
Cambridge University Press (via Crossref)
10
KovsieScholar Repository (University of the Free State - UFS UV)
10
more ...