Content Provider
Cambridge University Press
5,492
ScienceDirect (Elsevier - via Crossref)
2,396
Informa (via Crossref)
1,341
Wiley Online Library
1,230
JSTOR (via Crossref)
1,196
Informa
1,024
Wiley Online Library (via Crossref)
830
SAGE Publications
452
ScienceDirect (Elsevier)
435
Springer Nature (via Crossref)
426
SAGE Publications (via Crossref)
349
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
107
Utrecht University Repository
103
Cambridge University Press (via Crossref)
90
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository
60
JSTOR
41
University of Liège: ORBi (Open Repository and Bibliography)
39
IOP Publishing
32
University of St Andrews: Digital Research Repository
30
University of Toronto Press (U Toronto Press - via Crossref)
29
DIAL@UCLouvain (Université catholique de Louvain)
21
DIAL@USL-B (Université Saint-Louis, Bruxelles)
21
Queen's University Belfast Research Portal
20
Aberdeen University Research Archive (AURA)
17
IOP Publishing (via Crossref)
15
University of Nottingham: Repository@Nottingham
10
Canadian Science Publishing (via Crossref)
9
Caltech Authors (California Institute of Technology)
8
Longwoods Publishing (via Crossref)
8
The University of Queensland: UQ eSpace
8
University of Hertfordshire: UH Research Archive
8
Université de Lausanne (UNIL): Serval - Serveur académique lausannois
8
De Gruyter (via Crossref)
7
Schweizerbart Science Publishers
7
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System)
6
Padua Research Archive (IRIS - Università degli Studi di Padova)
6
University of Toronto Press (U Toronto Press)
6
David Publishing Company (via Crossref)
4
IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria)
4
Opin vísindi (Iceland)
4
Scientific Research Publishing (SCIRP Open Access - via Crossref)
4
Universidad de Chile: Repositorio académico
4
ARPI - Archivio della Ricerca dell'Università di Pisa
3
DataCite Metadata Store (German National Library of Science and Technology)
3
Johns Hopkins University Press
3
Schweizerbart Science Publishers (via Crossref)
3
Technical University of Denmark: DTU Orbit
3
University of Vienna: Phaidra
3
Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive)
3
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste)
3
more ...