Content Provider
Cambridge University Press
9,404
Informa (via Crossref)
2,024
Canadian Science Publishing (via Crossref)
1,754
ScienceDirect (Elsevier - via Crossref)
1,550
ScienceDirect (Elsevier)
1,233
Springer Nature (via Crossref)
1,064
Canadian Science Publishing
669
Informa
425
Wiley Online Library (via Crossref)
233
Wiley Online Library
226
The Royal Society (via Crossref)
145
Cambridge University Press (via Crossref)
112
The BMJ
94
SAGE Publications (via Crossref)
69
University of Chicago Press (via Crossref)
50
De Gruyter (via Crossref)
45
SAGE Publications
44
Oxford University Press (via Crossref)
43
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository
38
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
31
University of Liège: ORBi (Open Repository and Bibliography)
26
IEEE Publications (via Crossref)
21
DIAL@UCLouvain (Université catholique de Louvain)
17
DIAL@USL-B (Université Saint-Louis, Bruxelles)
17
Johns Hopkins University Press
17
Johns Hopkins University Press (via Crossref)
15
Brill (via Crossref)
12
Oxford University Press
11
Aberdeen University Research Archive (AURA)
10
The BMJ (via Crossref)
9
The University of Queensland: UQ eSpace
9
UCL Press (via Crossref)
9
De Gruyter
8
Ghent University Academic Bibliography
7
Utrecht University Repository
7
ACS Publications (via Crossref)
6
Schweizerbart Science Publishers
6
Université de Lausanne (UNIL): Serval - Serveur académique lausannois
6
Schweizerbart Science Publishers (via Crossref)
5
APA Publishing (American Psychological Association)
4
NIST Publications (National Institute of Standards and Technology - via Crossref)
4
OECD iLibrary (via Crossref)
4
Ovid (via Crossref)
4
Mark Allen (via Crossref)
3
Michigan State University Press (via Crossref)
3
The Royal Society
3
IEEE Publications
2
Inderscience Publishers (via Crossref)
2
Ovid
2
Scandinavian University Press (via Crossref)
2
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