Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
990
North Dakota State University (NDSU): Digital Horizons
70
University of Lethbridge Digitized Collections
30
Directory of Open Access Journals: DOAJ Articles
17
The University of Utah: J. Willard Marriott Digital Library
16
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
10
PALNI Digital Library Collections (Private Academic Library Network of Indiana)
10
ScienceDirect (Elsevier - via Crossref)
8
Unknown
8
Springer Nature (via Crossref)
7
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
6
Frontiers: Figshare
6
Hunter Library Digital Collections (Western Carolina University)
5
UTSA Digital Collections (The University of Texas at San Antonio)
5
University of the Pacific, McGeorge School of Law: Scholarly Commons
5
University of the Pacific: Scholarly Commons
5
Zenodo
5
Cambridge University Press
4
Frontiers (Publisher)
4
MDPI Open Access Publishing
4
Seoul National University: S-Space
4
Jultika - University of Oulu repository
3
National Institute of Polar Research Repository, Japan
3
PubMed Central (PMC)
3
Repozytorium Uniwersytetu w Białymstoku (RUB)
3
University of Alaska: ScholarWorks@UA
3
University of Nebraska-Lincoln: DigitalCommons@UNL
3
Biodiversity Heritage Library (BHL)
2
Brigham Young University (BYU): Digital Collections
2
Claremont Colleges Digital Library (CCDL)
2
Colecciones digitales - Biblioteca Virtual del Banco de la República
2
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
2
Jagiellonian University Repository
2
Nanjing Institute of Geology and Palaeontology: NIGPAS OpenIR (Chinese Academy of Sciences)
2
PANGAEA - Data Publisher for Earth & Environmental Science
2
ScholarWorks@UNIST (Ulsan National Institute of Science and Technology)
2
ScienceDirect (Elsevier)
2
Skemman (Iceland)
2
University of New Brunswick: Centre for Digital Scholarship Journals
2
APS Digital Library (American Philosophical Society)
1
Akademicka Platforma Czasopism
1
Akademicka Platforma Czasopism (APCZ)
1
Atlantis: Critical Studies in Gender, Culture & Social Justice
1
BBC - Bałtycka Digital Library (Poland)
1
BIROn - Birkbeck Institutional Research Online (Birkbeck University of London)
1
Bismarck State College (BSC): Mystic Memories
1
CQUniversity: acquire
1
Cambridge University Press (via Crossref)
1
City University of New York: CUNY Academic Works
1
Dalhousie University: DalSpace Institutional Repository
1
more ...