Content Provider
Frontiers: Figshare
97
DataCite Metadata Store (German National Library of Science and Technology)
82
Directory of Open Access Journals: DOAJ Articles
71
Unknown
58
PubMed Central (PMC)
30
ScienceDirect (Elsevier - via Crossref)
13
University of California: eScholarship
12
Frontiers (Publisher)
10
Wiley Online Library (via Crossref)
8
eCite UTAS (University of Tasmania)
8
Wiley Online Library
7
Oxford University Press
6
Springer Nature (via Crossref)
6
Defense Technical Information Center: DTIC Technical Reports database
3
KovsieScholar Repository (University of the Free State - UFS UV)
3
University of Technology Sydney: OPUS - Open Publications of UTS Scholars
3
Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences)
2
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
2
Old Dominion University: ODU Digital Commons
2
University of Tennessee, Knoxville: Trace
2
University of the Highlands and Islands: Research Database of UHI
2
ASM Journals (American Society for Microbiology - via Crossref)
1
ASM Journals (American Society for Microbiology)
1
Canadian Science Publishing (via Crossref)
1
IEDA: US Antarctic Program Data Center (via DataONE)
1
Johns Hopkins University Press
1
King Abdullah University of Science and Technology: KAUST Repository
1
Oxford University Press (via Crossref)
1
San José State University: SJSU ScholarWorks
1
Stockholm University: Publications (DiVA)
1
The University of Queensland: UQ eSpace
1
UNSW Sydney (The University of New South Wales): UNSWorks
1
University of Hong Kong: HKU Scholars Hub
1
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste)
1