Content Provider
Springer Nature (via Crossref)
531
ScienceDirect (Elsevier - via Crossref)
299
Wiley Online Library (via Crossref)
289
Stockholm University Press (via Crossref)
180
ScienceDirect (Elsevier)
178
Wiley Online Library
155
University of California Press (via Crossref)
75
Informa (via Crossref)
65
Stockholm University Press
49
University of California Press
36
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository
19
Theses Canada/Thèses Canada (Library and Archives Canada)
15
University of Alaska: ScholarWorks@UA
13
DIAL@UCLouvain (Université catholique de Louvain)
12
DIAL@USL-B (Université Saint-Louis, Bruxelles)
12
Informa
11
Schweizerbart Science Publishers (via Crossref)
10
Utrecht University Repository
10
ACS Publications
9
DataCite Metadata Store (German National Library of Science and Technology)
9
IEEE Publications (via Crossref)
9
IEEE Publications
7
IOP Publishing
7
University of Vienna: Phaidra
7
IOP Publishing (via Crossref)
5
McGill University: eScholarship@McGill
5
ACS Publications (via Crossref)
4
Caltech Authors (California Institute of Technology)
4
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca)
4
Inderscience Publishers (via Crossref)
3
Bentham Science Publishers (via Crossref)
2
DSpace@MIT (Massachusetts Institute of Technology)
2
Ghent University Academic Bibliography
2
Opin vísindi (Iceland)
2
PRISM - University of Calgary Digital Repository
2
RUcore - Rutgers University Community Repository
2
University of Hertfordshire: UH Research Archive
2
University of Liège: ORBi (Open Repository and Bibliography)
2
Unknown
2
Aberdeen University Research Archive (AURA)
1
Archivio della ricerca dell'Università di Modena e Reggio Emilia (Unimore: IRIS)
1
Dalhousie University: DalSpace Institutional Repository
1
Florida State University Digital Library (FSUDL)
1
Florida State University: DigiNole Commons
1
Florida State University: Publication of Archival Library & Museum Materials
1
IRIS Università degli Studi di Perugia
1
Inderscience Publishers
1
Sapienza Università di Roma: CINECA IRIS
1
Schweizerbart Science Publishers
1
Technical University of Denmark: DTU Orbit
1
more ...