Content Provider
Defense Technical Information Center: DTIC Technical Reports database
745
DataCite Metadata Store (German National Library of Science and Technology)
566
Directory of Open Access Journals: DOAJ Articles
461
PANGAEA - Data Publisher for Earth & Environmental Science
446
Unknown
219
LeibnizOpen (The Leibniz Association)
217
DataCite
199
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
186
University of North Texas: UNT Digital Library
151
Arctic Data Center (via DataONE)
136
Research Data Australia (Australian National Data Service - ANDS)
128
MDPI Open Access Publishing
115
NOAA NCEI Environmental Data Archive (via DataONE)
106
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
94
Zenodo
84
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR
81
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
72
Université de Nantes: HAL-UNIV-NANTES
66
Institut national des sciences de l'Univers: HAL-INSU
51
Frontiers: Figshare
47
Max Planck Society: MPG.PuRe
43
University of Tasmania: UTas ePrints
40
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
38
Naval Postgraduate School: Calhoun
37
Oregon Institue of Technology (OIT): Digital Collections
37
University of California: eScholarship
34
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
32
CyberLeninka (Scientific Electronic Library)
30
HAL Sorbonne Université
28
HELDA – University of Helsinki Open Repository
26
Université de Bretagne Occidentale: HAL
24
Aarhus University: Research
23
University of Calgary Journal Hosting
23
National Research Council Canada: NRC Publications Archive
21
Technical University of Denmark: DTU Orbit
21
Australian National University: ANU Digital Collections
20
University College London: UCL Discovery
20
University of St Andrews: Research Portal
20
DRO - Deakin Research Online
19
University of Michigan: Digital Collections
18
Digital.CSIC (Spanish National Research Council)
17
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
17
Luleå University of Technology Publications (DiVA)
17
University of Groningen research database
16
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
16
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
15
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
15
University of Tromsø: Munin Open Research Archive
15
École Polytechnique, Université Paris-Saclay: HAL
15
GEO-LEOe-docs (FID GEO)
14
more ...