Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
3,556
Zenodo
70
Unknown
20
LeibnizOpen (The Leibniz Association)
19
Knowledge Network for Biocomplexity (via DataONE)
18
Dryad Digital Repository (Duke University)
11
NOAA NCEI Environmental Data Archive (via DataONE)
11
Directory of Open Access Journals: DOAJ Articles
9
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
7
PubMed Central (PMC)
7
University of Lethbridge Digitized Collections
7
The Canadian Field-Naturalist (E-Journal)
6
Canadian Science Publishing (via Crossref)
5
Frontiers: Figshare
5
WikiBooks - Open-content textbooks
5
University of Michigan: Digital Collections
4
University of Victoria (Canada): UVicDSpace
4
BioOne Online Journals
3
Borealis
3
Canadian Science Publishing
3
The University of Maine: DigitalCommons@UMaine
3
University of Canberra Research Portal
3
University of Saskatchewan: eCommons@USASK
3
Frontiers (Publisher)
2
MDPI Open Access Publishing
2
North Dakota State University (NDSU): Digital Horizons
2
Oxford University Press (via Crossref)
2
Portland Public Library: Digital Commons
2
University of Alaska: ScholarWorks@UA
2
University of California: eScholarship
2
University of Central Florida (UCF): STARS (Showcase of Text, Archives, Research & Scholarship)
2
University of Toronto: Research Repository T-Space
2
Wiley Online Library
2
AAAS Resource Center (American Association for the Advancement of Science)
1
AUrora - Auburn University Scholarly Repository
1
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
Arctic Institute of North America (via Crossref)
1
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
1
BioMed Central
1
Biodiversity Heritage Library (BHL)
1
Brigham Young University (BYU): ScholarsArchive
1
COS Center for Open Science (via Crossref)
1
Dalhousie University: DalSpace Institutional Repository
1
De Gruyter
1
Digital.CSIC (Spanish National Research Council)
1
Düzce University Institutional Repository (DSpace@Düzce)
1
Freie Universität Berlin: Refubium (FU Berlin)
1
HighWire Press (Stanford University)
1
Hunter Library Digital Collections (Western Carolina University)
1
IREKANI - Instituto de Biología, Universidad Nacional Autónoma de México (UNAM)
1
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