Content Provider
Wiley Online Library (via Crossref)
1,989
Oxford University Press (via Crossref)
1,966
Canadian Science Publishing (via Crossref)
1,893
Wiley Online Library
1,162
Springer Nature (via Crossref)
963
Canadian Science Publishing
856
ScienceDirect (Elsevier - via Crossref)
851
Oxford University Press
657
Cambridge University Press
584
Informa (via Crossref)
572
JSTOR (via Crossref)
411
ScienceDirect (Elsevier)
388
Brill (via Crossref)
301
De Gruyter (via Crossref)
268
University of Chicago Press (via Crossref)
124
Informa
116
JSTOR
105
University of Chicago Press
83
Brill
68
De Gruyter
60
Cambridge University Press (via Crossref)
55
Sciendo (de Gruyter - via CrossRef)
51
SAGE Publications (via Crossref)
25
The University of Queensland: UQ eSpace
24
Queen's University Belfast Research Portal
19
SAGE Publications
15
Frontiers (Publisher)
14
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository
14
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
14
University of St Andrews: Digital Research Repository
9
Bentham Science Publishers (via Crossref)
6
Aberdeen University Research Archive (AURA)
5
DataCite Metadata Store (German National Library of Science and Technology)
5
Unknown
5
Ghent University Academic Bibliography
4
Schweizerbart Science Publishers (via Crossref)
4
Thieme (via Crossref)
4
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System)
3
IRIS Università degli Studi di Napoli Federico II
3
Mary Ann Liebert, Inc., publishers (via Crossref)
3
Opin vísindi (Iceland)
3
Sapienza Università di Roma: CINECA IRIS
3
University of California Press (via Crossref)
3
Utrecht University Repository
3
Zenodo
3
ARPI - Archivio della Ricerca dell'Università di Pisa
2
IRIS UNIPV (Università degli studi di Pavia)
2
IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria)
2
OpenMETU (Middle East Technical University)
2
Padua Research Archive (IRIS - Università degli Studi di Padova)
2
more ...