Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
519
Directory of Open Access Journals: DOAJ Articles
437
Unknown
436
Wiley Online Library
309
Cambridge University Press
231
University of Canterbury, Christchurch: UC Research Repository
219
PubMed Central (PMC)
181
University of Otago: Research Archive (OUR Archive)
157
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
136
DataCite
131
PANGAEA - Data Publisher for Earth & Environmental Science
129
eCite UTAS (University of Tasmania)
123
The University of Queensland: UQ eSpace
119
The University of Waikato: Research Commons
114
CESSDA DC Data Catalogue (Consortium of European Social Science Data Archives)
96
Informa (via Crossref)
91
Magnolia press
91
WikiBooks - Open-content textbooks
86
University of Tasmania: UTas ePrints
84
University of St Andrews: Research Portal
78
Université de Nantes: HAL-UNIV-NANTES
75
Victoria University of Wellington: ResearchArchive
75
HighWire Press (Stanford University)
73
Massey University: Massey Research Online
70
Informa
69
Lincoln University (New Zealand): Lincoln U Research Archive
68
Springer Nature (via Crossref)
68
Copernicus Publications: E-Journals
58
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
56
The University of Adelaide: Digital Library
55
University of Lethbridge Digitized Collections
54
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
47
Niedersächsisches Online-Archiv NOA
47
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
46
ScienceDirect (Elsevier - via Crossref)
46
BioOne Online Journals
45
MDPI Open Access Publishing
44
LeibnizOpen (The Leibniz Association)
43
Institut national des sciences de l'Univers: HAL-INSU
41
Natural Environment Research Council: NERC Open Research Archive
41
The Royal Society
41
University of Auckland Research Repository - ResearchSpace
39
Oxford University Press
38
Macquarie University Research Portal
37
Defense Technical Information Center: DTIC Technical Reports database
35
Australian National University: ANU Digital Collections
33
Digital.CSIC (Spanish National Research Council)
32
University of North Texas: UNT Digital Library
32
Wiley Online Library (via Crossref)
32
Hathi Trust Digital Library
30
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