Content Provider
Springer Nature (via Crossref)
4,947
AAAS Resource Center (American Association for the Advancement of Science - via Crossref)
1,829
AAAS Resource Center (American Association for the Advancement of Science)
1,365
PLOS
1,062
PLOS (via CrossRef)
644
ScienceDirect (Elsevier - via Crossref)
412
The Royal Society
149
The Royal Society (via Crossref)
116
University of Leicester: Leicester Research Archive (LRA)
83
ScienceDirect (Elsevier)
74
Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences)
73
Imperial College London: Spiral
62
The University of Queensland: UQ eSpace
50
Informa (via Crossref)
47
University of the Highlands and Islands: Research Database of UHI
43
University College London: UCL Discovery
42
Uppsala University: Publications (DiVA)
31
Canadian Science Publishing (via Crossref)
30
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences)
27
Lund University Publications (LUP)
27
Canadian Science Publishing
26
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR
25
Institute of Botany: IBCAS OpenIR (Chinese Academy Of Sciences)
24
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
19
Opin vísindi (Iceland)
18
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
16
Oxford University Press
14
Science China Press (via Crossref)
14
Science China Press
12
University of Liège: ORBi (Open Repository and Bibliography)
12
Curtin University: espace
11
Umeå University: Publications (DiVA)
11
Informa
10
Northwest Institute of Plateau Biology: NWIPB OpenIR (Chinese Academy of Sciences)
9
Oxford University Press (via Crossref)
7
SAGE Publications
7
Stockholm University: Publications (DiVA)
7
İstanbul Üniversitesi Açık Erişim Sistemi
7
Swedish Museum of Natural History: Publications (DiVA)
6
Université de Lausanne (UNIL): Serval - Serveur académique lausannois
6
Unknown
6
Caltech Authors (California Institute of Technology)
5
De Gruyter (via Crossref)
5
Ghent University Academic Bibliography
5
SAGE Publications (via Crossref)
5
The University of Waikato: Research Commons
5
Universidad de Chile: Repositorio académico
5
Wiley Online Library (via Crossref)
5
IRIS Università degli Studi di Palermo
4
IRInSubria - Institutional Repository Insubria (Università degli Studi dell’Insubria)
4
more ...