Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5,171
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
958
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
380
University of Tromsø: Munin Open Research Archive
358
DergiPark Akademik (E-Journals)
310
Repository of the University of Rijeka
303
The University of Split Repository
283
WikiBooks - Open-content textbooks
276
Jagiellonian University Repository
252
Informa (via Crossref)
222
Umeå University: Publications (DiVA)
204
Digital Library of Jelenia Góra (Grodzka Biblioteka Publiczna Jelenia Gora)
199
Zenodo
190
OpenEdition
185
ArXiv.org (Cornell University Library)
183
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
Skemman (Iceland)
113
Dove Medical Press
111
Tomas Bata University Zlín: TBU DSpace
108
University North Digital Repository
104
University of West Bohemia Digital Library
102
Doria (National Library of Finland)
96
Université de Nantes: HAL-UNIV-NANTES
92
Digital Repository Juraj Dobrila University of Pula
91
LaCRIS - University of Lapland Current Research System
90
Australian National University: ANU Digital Collections
89
Macquarie University Research Portal
88
University of Zadar Institutional Repository
81
University of Michigan: Digital Collections
80
Oxford University Press (via Crossref)
79
University of Economics, Prague (VŠE): Science and Research
77
Swinburne University of Technology: Swinburne Research Bank
75
University of Tromsø: Septentrio Academic Publishing
75
Springer Nature (via Crossref)
72
Arca (BC's Digital Treasures)
70
Caltech Authors (California Institute of Technology)
69
Cambridge University Press
69
The University of Utah: J. Willard Marriott Digital Library
69
more ...