Content Provider
Unknown
126
University of Canterbury, Christchurch: UC Research Repository
116
DataCite Metadata Store (German National Library of Science and Technology)
112
Directory of Open Access Journals: DOAJ Articles
95
Cambridge University Press
93
eCite UTAS (University of Tasmania)
52
The University of Queensland: UQ eSpace
44
The University of Waikato: Research Commons
44
University of Otago: Research Archive (OUR Archive)
41
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
39
Wiley Online Library
39
PubMed Central (PMC)
38
University of Tasmania: UTas ePrints
33
Magnolia press
31
PANGAEA - Data Publisher for Earth & Environmental Science
28
Université de Nantes: HAL-UNIV-NANTES
27
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
25
Victoria University of Wellington: ResearchArchive
24
HighWire Press (Stanford University)
22
Natural Environment Research Council: NERC Open Research Archive
21
The University of Adelaide: Digital Library
21
Università degli Studi di Napoli "Parthenope": CINECA IRIS
21
Lincoln University (New Zealand): Lincoln U Research Archive
20
Copernicus Publications: E-Journals
18
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
18
Ohio State University (OSU): Knowledge Bank
18
Massey University: Massey Research Online
17
Informa (via Crossref)
16
Institut national des sciences de l'Univers: HAL-INSU
16
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
15
The Royal Society
14
WikiBooks - Open-content textbooks
13
Digital.CSIC (Spanish National Research Council)
12
National Institute of Polar Research Repository, Japan
12
Niedersächsisches Online-Archiv NOA
12
Springer Nature (via Crossref)
12
University of Pretoria: UPSpace
12
University of Southampton: e-Prints Soton
12
Australian National University: ANU Digital Collections
11
Defense Technical Information Center: DTIC Technical Reports database
11
University of Auckland Research Repository - ResearchSpace
10
Australian Nuclear Science and Technology Organisation: ANSTO Publications Online
9
BioOne Online Journals
8
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
8
MDPI Open Access Publishing
8
Pensoft Publishers
8
ScienceDirect (Elsevier - via Crossref)
8
University of California: eScholarship
8
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
7
Lund University Publications (LUP)
7
more ...