Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5,253
Croatian Digital Theses Repository (National and University Library in Zagreb)
2,482
Unknown
1,258
Digital Library of University of Maribor
1,098
Directory of Open Access Journals: DOAJ Articles
1,048
Charles University CU Digital repository
966
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
606
University of Tromsø: Munin Open Research Archive
473
RUNIOS - Repository of Josip Juraj Strossmayer University of Osijek
384
DergiPark Akademik (E-Journals)
310
Repository of the University of Rijeka
304
The University of Split Repository
283
WikiBooks - Open-content textbooks
278
Umeå University: Publications (DiVA)
267
Jagiellonian University Repository
256
Informa (via Crossref)
245
Zenodo
201
Digital Library of Jelenia Góra (Grodzka Biblioteka Publiczna Jelenia Gora)
199
OpenEdition
187
ArXiv.org (Cornell University Library)
183
Theseus.fi (Open Repository of the Universities of Applied Sciences)
183
LaCRIS - University of Lapland Current Research System
180
Federation of Finnish Learned Societies: Scientific Journals Online
173
PubMed Central (PMC)
161
Sveznalica (University of Healths Applied Services)
144
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
143
Skemman (Iceland)
115
Uppsala University: Publications (DiVA)
114
Dove Medical Press
112
Tomas Bata University Zlín: TBU DSpace
108
University North Digital Repository
104
University of Tromsø: Septentrio Academic Publishing
103
University of West Bohemia Digital Library
102
Macquarie University Research Portal
100
Doria (National Library of Finland)
99
Université de Nantes: HAL-UNIV-NANTES
95
Digital Repository Juraj Dobrila University of Pula
91
Australian National University: ANU Digital Collections
90
Cambridge University Press
88
Springer Nature (via Crossref)
86
Oxford University Press (via Crossref)
82
University of Zadar Institutional Repository
81
University of Michigan: Digital Collections
80
HELDA – University of Helsinki Open Repository
78
University of Economics, Prague (VŠE): Science and Research
77
Swinburne University of Technology: Swinburne Research Bank
76
RePEc (Research Papers in Economics)
75
more ...