Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
242
Dryad Digital Repository (Duke University)
103
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
50
Unknown
48
Directory of Open Access Journals: DOAJ Articles
35
LSU Digital Commons (Louisiana State University)
35
Portland State University: PDXScholar
23
The University of Waikato: Research Commons
19
Frontiers: Figshare
18
PANGAEA - Data Publisher for Earth & Environmental Science
17
Springer Nature (via Crossref)
17
National Institute of Polar Research Repository, Japan
12
Cambridge University Press
11
ScienceDirect (Elsevier - via Crossref)
11
Wiley Online Library
11
Copernicus Publications: E-Journals
10
Montana State University (MSU): ScholarWorks
10
Indigo - University of Illinois at Chicago
9
Ohio State University (OSU): Knowledge Bank
9
PubMed Central (PMC)
8
University of Illinois at Chicago: UIC INDIGO (INtellectual property in DIGital form available online in an Open environment)
8
DataCite
7
Informa (via Crossref)
6
NASA Technical Reports Server (NTRS)
6
IEDA: US Antarctic Program Data Center (via DataONE)
5
MDPI Open Access Publishing
5
Open Access Victoria University of Wellington / Te Herenga Waka
5
University of California: eScholarship
5
University of Colorado, Boulder: CU Scholar
5
Aarhus University: Research
4
Cardiff University: ORCA (Online Research @ Cardiff)
4
Niedersächsisches Online-Archiv NOA
4
Ohio University Library Digital Archives
4
OhioLINK: Electronic Theses and Dissertations Center
4
VTechWorks (VirginiaTech)
4
Brigham Young University (BYU): ScholarsArchive
3
Informa
3
PALNI Digital Library Collections (Private Academic Library Network of Indiana)
3
The University of Maine: DigitalCommons@UMaine
3
Victoria University of Wellington: ResearchArchive
3
Wiley Online Library (via Crossref)
3
Cologne University: KUPS
2
Dartmouth Digital Commons (Dartmouth College)
2
Environmental Data Initiative (via DataONE)
2
Natural Environment Research Council: NERC Open Research Archive
2
Northern Illinois University (NIU): Huskie Commons Repository
2
Oxford University Press (via Crossref)
2
Padua Research Archive (IRIS - Università degli Studi di Padova)
2
RePEc (Research Papers in Economics)
2
Research Data Australia (Australian National Data Service - ANDS)
2
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