Content Provider
Springer Nature (via Crossref)
1,721
ScienceDirect (Elsevier - via Crossref)
1,136
Wiley Online Library (via Crossref)
1,113
Wiley Online Library
1,077
ScienceDirect (Elsevier)
693
Stockholm University Press (via Crossref)
689
Informa (via Crossref)
239
Stockholm University Press
217
University of California Press (via Crossref)
125
University of California Press
114
IEEE Publications
89
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository
82
Informa
74
Utrecht University Repository
63
Schweizerbart Science Publishers (via Crossref)
53
IEEE Publications (via Crossref)
51
Theses Canada/Thèses Canada (Library and Archives Canada)
38
IOP Publishing
30
DIAL@USL-B (Université Saint-Louis, Bruxelles)
27
DIAL@UCLouvain (Université catholique de Louvain)
26
ACS Publications
23
DataCite Metadata Store (German National Library of Science and Technology)
23
University of Alaska: ScholarWorks@UA
22
McGill University: eScholarship@McGill
20
University of Liège: ORBi (Open Repository and Bibliography)
19
Caltech Authors (California Institute of Technology)
17
Frontiers (Publisher)
16
IOP Publishing (via Crossref)
15
University of Hertfordshire: UH Research Archive
15
ACS Publications (via Crossref)
12
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca)
12
University of Illinois at Urbana-Champaign: IDEALS (Illinois Digital Environment for Access to Learning and Scholarship)
9
Bentham Science Publishers (via Crossref)
7
University of Vienna: Phaidra
7
Florida State University Digital Library (FSUDL)
6
Florida State University: DigiNole Commons
6
University of Miami: Scholarly Repository
6
Università degli Studi di Napoli "Parthenope": CINECA IRIS
6
Inderscience Publishers (via Crossref)
5
The University of Queensland: UQ eSpace
5
University of Michigan: Deep Blue
5
Università Politecnica delle Marche: IRIS
5
Dalhousie University: DalSpace Institutional Repository
4
OhioLINK: Electronic Theses and Dissertations Center
4
Opin vísindi (Iceland)
4
PRISM - University of Calgary Digital Repository
4
Schweizerbart Science Publishers
4
The University of Manchester: Research Explorer
4
University of Oklahoma/Oklahoma State University: SHAREOK Repository
4
Unknown
4
more ...