Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
512
Unknown
436
Directory of Open Access Journals: DOAJ Articles
406
University of Canterbury, Christchurch: UC Research Repository
219
Cambridge University Press
177
PubMed Central (PMC)
169
University of Otago: Research Archive (OUR Archive)
157
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
136
Wiley Online Library
125
eCite UTAS (University of Tasmania)
123
The University of Queensland: UQ eSpace
119
The University of Waikato: Research Commons
114
Informa (via Crossref)
90
Magnolia press
89
University of Tasmania: UTas ePrints
84
Université de Nantes: HAL-UNIV-NANTES
75
Victoria University of Wellington: ResearchArchive
75
HighWire Press (Stanford University)
73
WikiBooks - Open-content textbooks
73
Massey University: Massey Research Online
70
Springer Nature (via Crossref)
68
PANGAEA - Data Publisher for Earth & Environmental Science
61
Lincoln University (New Zealand): Lincoln U Research Archive
58
Copernicus Publications: E-Journals
56
University of St Andrews: Research Portal
55
The University of Adelaide: Digital Library
54
University of Lethbridge Digitized Collections
54
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
52
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
46
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
46
ScienceDirect (Elsevier - via Crossref)
46
BioOne Online Journals
45
MDPI Open Access Publishing
44
Niedersächsisches Online-Archiv NOA
44
Institut national des sciences de l'Univers: HAL-INSU
41
LeibnizOpen (The Leibniz Association)
41
Natural Environment Research Council: NERC Open Research Archive
41
University of Auckland Research Repository - ResearchSpace
39
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
The University of Utah: J. Willard Marriott Digital Library
30
University of Southampton: e-Prints Soton
30
Apollo - University of Cambridge Repository
25
Murdoch University: Murdoch Research Repository
25
Ohio State University (OSU): Knowledge Bank
25
da|ra - Registration agency for social and economic data
25
more ...