Content Provider
Unknown
289
PubMed Central (PMC)
159
Copernicus Publications: E-Journals
153
MDPI Open Access Publishing
48
DataCite Metadata Store (German National Library of Science and Technology)
29
HighWire Press (Stanford University)
22
Defense Technical Information Center: DTIC Technical Reports database
21
IRD (Institute de recherche pour le développement): Horizon
12
eCite UTAS (University of Tasmania)
12
Natural Environment Research Council: NERC Open Research Archive
5
W&M ScholarWorks
5
Florida State University Digital Library (FSUDL)
4
Florida State University: DigiNole Commons
4
BioOne Online Journals
3
University of Rhode Island: DigitalCommons@URI
3
University of Nebraska-Lincoln: DigitalCommons@UNL
2
BORIS (Bern Open Repository and Information System, University of Bern)
1
Bavarian Digital Repository (BDR - Bayerische Staatsbibliothek Munich, BSB)
1
Brigham Young University (BYU): ScholarsArchive
1
DataCat: The Research Data Catalogue (University of Liverpool)
1
Digital Collections of Colorado (Colorado State University)
1
Hathi Trust Digital Library
1
Mountain Scholar (Digital Collections of Colorado and Wyoming)
1
Norwegian Institute for Nature Research: Brage NINA
1
PennState: Electronic Theses and Dissertations (eTD)
1
Research Data Unipd (Università degli Studi die Padova)
1
University of Southampton: e-Prints Soton
1
University of Tasmania: UTas ePrints
1
Victoria University of Wellington: ResearchArchive
1
Western Washington University: CEDAR (Contributing to Education through Digital Access to Research)
1