Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5,181
Croatian Digital Theses Repository (National and University Library in Zagreb)
2,480
Unknown
1,186
Digital Library of University of Maribor
1,098
Charles University CU Digital repository
965
Directory of Open Access Journals: DOAJ Articles
920
Marmara Üniversitesi: Açık Arşiv Hizmete Girdi
867
Repository of the University of Ljubljana (RUL)
807
Hrčak - Portal of scientific journals of Croatia
614
OLAC: Open Language Archives Community
600
RUNIOS - Repository of Josip Juraj Strossmayer University of Osijek
384
University of Tromsø: Munin Open Research Archive
359
Jagiellonian University Repository
320
DergiPark Akademik (E-Journals)
310
Repository of the University of Rijeka
304
The University of Split Repository
285
WikiBooks - Open-content textbooks
276
Umeå University: Publications (DiVA)
206
Digital Library of Jelenia Góra (Grodzka Biblioteka Publiczna Jelenia Gora)
199
Zenodo
190
OpenEdition
185
ArXiv.org (Cornell University Library)
183
Informa (via Crossref)
171
Theseus.fi (Open Repository of the Universities of Applied Sciences)
169
Sveznalica (University of Healths Applied Services)
144
Federation of Finnish Learned Societies: Scientific Journals Online
141
PubMed Central (PMC)
141
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
139
Dove Medical Press
113
Skemman (Iceland)
113
Tomas Bata University Zlín: TBU DSpace
108
Macquarie University Research Portal
105
University North Digital Repository
104
University of West Bohemia Digital Library
102
Doria (National Library of Finland)
96
Australian National University: ANU Digital Collections
92
Université de Nantes: HAL-UNIV-NANTES
92
Digital Repository Juraj Dobrila University of Pula
91
LaCRIS - University of Lapland Current Research System
90
Oxford University Press
89
Wiley Online Library
82
University of Zadar Institutional Repository
81
University of Michigan: Digital Collections
80
Swinburne University of Technology: Swinburne Research Bank
79
University of Economics, Prague (VŠE): Science and Research
77
Informa
76
University of Tromsø: Septentrio Academic Publishing
75
Springer Nature (via Crossref)
72
Arca (BC's Digital Treasures)
70
Cambridge University Press
70
more ...