Content Provider
Directory of Open Access Journals: DOAJ Articles
1,178
Hirsla - Landspítali University Hospital research archive
489
PANGAEA - Data Publisher for Earth & Environmental Science
417
DataCite Metadata Store (German National Library of Science and Technology)
322
DataCite
299
Unknown
290
University of California: eScholarship
187
Defense Technical Information Center: DTIC Technical Reports database
156
CyberLeninka (Scientific Electronic Library)
113
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
101
MDPI Open Access Publishing
89
LeibnizOpen (The Leibniz Association)
85
Umeå University: Publications (DiVA)
82
University of Southern Denmark Research Portal
77
University of St Andrews: Research Portal
74
Frontiers: Figshare
72
Opin vísindi (Iceland)
65
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
56
Université de Nantes: HAL-UNIV-NANTES
54
HELDA – University of Helsinki Open Repository
50
Digital.CSIC (Spanish National Research Council)
49
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
49
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
47
Jultika - University of Oulu repository
47
Imperial College London: Spiral
43
University of Copenhagen: Research
42
Aarhus University: Research
41
Zenodo
40
University College London: UCL Discovery
34
University of Tromsø: Munin Open Research Archive
34
CDC Stacks (Centers for Disease Control and Prevention)
32
University of North Texas: UNT Digital Library
32
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
27
DRO - Deakin Research Online
27
ScienceDirect (Elsevier - via Crossref)
27
Digital Library of University of Maribor
26
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
26
Instituto Español de Oceanografía: e-IEO
25
PubMed Central (PMC)
25
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
24
Croatian Digital Theses Repository (National and University Library in Zagreb)
24
BioMed Central
22
Institut national des sciences de l'Univers: HAL-INSU
21
Wageningen UR (University & Research Centre): Digital Library
21
Australian Catholic University: ACU Research Bank
19
Ghent University Academic Bibliography
19
University of Massachusetts: ScholarWorks@UMass Amherst
19
Apollo - University of Cambridge Repository
18
NORA (National aggregator of open repositories of Russian universities)
18
Smithsonian Institution: Figshare
18
more ...