Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
442
OLAC: Open Language Archives Community
305
Zenodo
173
University of Washington, Seattle: Digital Collections
72
Unknown
66
Arctic Council Repository
50
WikiBooks - Open-content textbooks
35
Wiley Online Library
34
APS Digital Library (American Philosophical Society)
31
University of Michigan: Digital Collections
24
Hathi Trust Digital Library
23
PubMed Central (PMC)
22
Oklahoma State University: Digital Collections @ OKSTATE Library
20
Cambridge University Press
19
The University of Kansas: KU ScholarWorks
19
University of Alaska: ScholarWorks@UA
19
JSTOR (via Crossref)
18
Oxford University Press (via Crossref)
17
John Benjamins Publishing Company
15
Oxford University Press
15
Directory of Open Access Journals: DOAJ Articles
14
University of California: eScholarship
14
University of Copenhagen: Research
12
Utah State University: DigitalCommons@USU
12
DataCite
11
De Gruyter (via Crossref)
11
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
10
Cambridge University Press (via Crossref)
10
Creighton University: Creighton Digital Repository (CDR)
10
Érudit.org (Université Montréal)
10
HighWire Press (Stanford University)
9
ScienceDirect (Elsevier - via Crossref)
9
University of Chicago Press (via Crossref)
9
Washington State University: WSU Libraries Digital Collections
9
Wiley Online Library (via Crossref)
9
Biodiversity Heritage Library (BHL)
8
De Gruyter
8
JSTOR
8
The University of Utah: J. Willard Marriott Digital Library
8
University of Calgary Journal Hosting
8
Université de Nantes: HAL-UNIV-NANTES
8
AAAS Resource Center (American Association for the Advancement of Science)
7
CyberLeninka (Scientific Electronic Library)
7
Max Planck Society: MPG.PuRe
7
Arctic Data Center (via DataONE)
6
Oregon Digital (University of Oregon/Oregon State University)
6
UI Press - University of Illinois Press (via Crossref)
6
Arctic Portal Library
5
Informa
5
SAGE Publications
5
more ...