Content Provider
Directory of Open Access Journals: DOAJ Articles
124
Defense Technical Information Center: DTIC Technical Reports database
102
MDPI Open Access Publishing
67
DataCite Metadata Store (German National Library of Science and Technology)
66
Zenodo
40
Research Data Australia (Australian National Data Service - ANDS)
38
DataCite
25
NOAA NCEI Environmental Data Archive (via DataONE)
25
Chalmers University of Technology: Chalmers research
23
Unknown
18
JPL Technical Report Server
17
University of Tromsø: Munin Open Research Archive
17
Technical University of Denmark: DTU Orbit
15
Aalto University Publication Archive (Aaltodoc)
12
University of Waterloo, Canada: Institutional Repository
11
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
9
Technical University of Denmark (DTU): Fighsare
9
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
8
ETH Zürich Research Collection
7
Institut national de la recherche scientifique, Québec: Espace INRS
7
PANGAEA - Data Publisher for Earth & Environmental Science
7
VTT's Research Information Portal
7
Arctic Data Center (via DataONE)
5
Delft University of Technology: Institutional Repository
5
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
4
HELDA – University of Helsinki Open Repository
4
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System)
4
KovsieScholar Repository (University of the Free State - UFS UV)
4
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
4
Michigan Technological University: Digital Commons @ Michigan Tech
4
National Chengchi University Institutional Repository (NCCUIR)
4
PRISM - University of Calgary Digital Repository
4
University College London: UCL Discovery
4
University of Calgary Journal Hosting
4
Université de Bretagne Occidentale: HAL
4
Université de Nantes: HAL-UNIV-NANTES
4
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3
Archives ouvertes Hal IMT Atlantique
3
Brigham Young University (BYU): ScholarsArchive
3
Frontiers: Figshare
3
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
3
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences)
3
INSA Rennes HAL (Institut National des Sciences Appliquées)
3
Naval Postgraduate School: Calhoun
3
ORNL DAAC (via DataONE)
3
RE.PUBLIC@POLIMI - Research Publications at Politecnico di Milano
3
The University of Kansas: KU ScholarWorks
3
Theses Canada/Thèses Canada (Library and Archives Canada)
3
Universidade Federal do Rio Grande do Sul (UFRGS): Lume
3
Universitat Politècnica de Catalunya, BarcelonaTech: UPCommons - Global access to UPC knowledge
3
more ...