Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
10,805
Zenodo
54
North Dakota State University (NDSU): Digital Horizons
42
Unknown
40
LeibnizOpen (The Leibniz Association)
38
Directory of Open Access Journals: DOAJ Articles
23
WikiBooks - Open-content textbooks
15
Washington State University: WSU Libraries Digital Collections
12
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
10
Institute for Marine Research: Brage IMR
10
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
9
PubMed Central (PMC)
9
USGS Science Data Catalog (via DataONE)
9
University of the Pacific, McGeorge School of Law: Scholarly Commons
9
University of the Pacific: Scholarly Commons
9
Wiley Online Library (via Crossref)
9
Cambridge University Press
7
David Rumsey Historical Map Collection (Cartography Associates)
7
University of Tromsø: Munin Open Research Archive
7
Wiley Online Library
7
Defense Technical Information Center: DTIC Technical Reports database
6
ESS-DIVE: Deep Insight for Earth Science Data (via DataONE)
6
NOAA NCEI Environmental Data Archive (via DataONE)
6
The University of Utah: J. Willard Marriott Digital Library
6
Université de Nantes: HAL-UNIV-NANTES
6
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
5
Dryad Digital Repository (Duke University)
5
Norwegian Institute for Nature Research: Brage NINA
5
Norwegian Institute for Water research: NIVA Open Access Archive (Brage)
5
Open archive Norwegian University of Life Sciences: Brage NMBU
5
PANGAEA - Data Publisher for Earth & Environmental Science
5
ScholarSpace at University of Hawaii at Manoa
5
University of Bergen: Bergen Open Research Archive (BORA-UiB)
5
University of St Andrews: Research Portal
5
University of Washington, Seattle: Digital Collections
5
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
4
Digital.CSIC (Spanish National Research Council)
4
Ghent University Academic Bibliography
4
HighWire Press (Stanford University)
4
NTNU Open Archive (Norwegian University of Science and Technology)
4
RePEc (Research Papers in Economics)
4
University of Groningen research database
4
University of Southampton: e-Prints Soton
4
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
3
Hathi Trust Digital Library
3
Springer Nature (via Crossref)
3
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
3
University College London: UCL Discovery
3
Uppsala University: Publications (DiVA)
3
Apollo - University of Cambridge Repository
2
more ...