Content Provider
Cambridge University Press
9,740
Informa (via Crossref)
2,091
Canadian Science Publishing (via Crossref)
1,858
ScienceDirect (Elsevier - via Crossref)
1,795
Springer Nature (via Crossref)
1,064
ScienceDirect (Elsevier)
1,051
Canadian Science Publishing
837
Informa
456
Wiley Online Library
254
Wiley Online Library (via Crossref)
239
The Royal Society (via Crossref)
145
Cambridge University Press (via Crossref)
117
The BMJ
95
SAGE Publications (via Crossref)
74
SAGE Publications
62
University of Chicago Press (via Crossref)
50
De Gruyter (via Crossref)
49
Oxford University Press (via Crossref)
47
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
30
University of Liège: ORBi (Open Repository and Bibliography)
26
IEEE Publications (via Crossref)
22
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository
21
DIAL@USL-B (Université Saint-Louis, Bruxelles)
17
Johns Hopkins University Press
17
DIAL@UCLouvain (Université catholique de Louvain)
16
Johns Hopkins University Press (via Crossref)
15
Oxford University Press
15
SPIE Publications (via Crossref)
13
Brill (via Crossref)
12
Aberdeen University Research Archive (AURA)
10
The BMJ (via Crossref)
9
The University of Queensland: UQ eSpace
9
UCL Press (via Crossref)
9
Schweizerbart Science Publishers
8
ACS Publications (via Crossref)
7
De Gruyter
7
Ghent University Academic Bibliography
7
Schweizerbart Science Publishers (via Crossref)
7
Université de Lausanne (UNIL): Serval - Serveur académique lausannois
6
Utrecht University Repository
6
ACM Publications (Association for Computing Machinery - via Crossref)
5
NIST Publications (National Institute of Standards and Technology - via Crossref)
4
OECD iLibrary (via Crossref)
4
Ovid (via Crossref)
4
The Royal Society
4
APA Publishing (American Psychological Association)
3
Mark Allen (via Crossref)
3
Michigan State University Press (via Crossref)
3
IEEE Publications
2
Inderscience Publishers (via Crossref)
2
more ...