Content Provider
Informa (via Crossref)
785
Directory of Open Access Journals: DOAJ Articles
562
Informa
115
Oxford University Press (via Crossref)
92
Springer Nature (via Crossref)
71
DataCite
45
Ovid (via Crossref)
44
PubMed Central (PMC)
44
Hirsla - Landspítali University Hospital research archive
29
Opin vísindi (Iceland)
28
Umeå University: Publications (DiVA)
28
ScienceDirect (Elsevier - via Crossref)
27
LeibnizOpen (The Leibniz Association)
25
University of Tromsø: Munin Open Research Archive
23
The BMJ (via Crossref)
20
BioMed Central
19
ScienceDirect (Elsevier)
17
HighWire Press (Stanford University)
15
Cambridge University Press
14
HELDA – University of Helsinki Open Repository
12
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
11
Unknown
11
University of Alberta: Era - Education and Research Archive
10
University of Copenhagen: Research
10
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
9
DataCite Metadata Store (German National Library of Science and Technology)
9
Oxford University Press
9
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
8
Imperial College London: Spiral
8
Jultika - University of Oulu repository
8
Theses Canada/Thèses Canada (Library and Archives Canada)
7
Wiley Online Library (via Crossref)
7
Aarhus University: Research
6
Columbia University: Academic Commons
6
Digital.CSIC (Spanish National Research Council)
6
Ovid
6
University of St Andrews: Research Portal
6
Wiley Online Library
6
Harvard University: DASH - Digital Access to Scholarship at Harvard
5
University of Southern Denmark Research Portal
5
Utrecht University Repository
5
Institut national des sciences de l'Univers: HAL-INSU
4
LAEI VL (Lithuanian Institute of Agrarian Economics Virtual Library)
4
LSRC VL (Lithuanian Social Research Centre Virtual Library)
4
The University of Western Ontario: Scholarship@Western
4
University of Malta: OAR@UM
4
Université de Bretagne Occidentale: HAL
4
Uppsala University: Publications (DiVA)
4
Griffith University: Griffith Research Online
3
PUBLISSO Fachrepositorium Lebenswissenschaften (ZB MED)
3
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