Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
187
Frontiers: Figshare
180
Unknown
121
ScienceDirect (Elsevier - via Crossref)
106
ScienceDirect (Elsevier)
67
Frontiers (Publisher)
59
PubMed Central (PMC)
40
Institute of Hydrobiology, Chinese Academy of Sciences: IHB OpenIR
30
Springer Nature (via Crossref)
20
ASM Journals (American Society for Microbiology)
17
ASM Journals (American Society for Microbiology - via Crossref)
14
Wiley Online Library
8
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
7
Wiley Online Library (via Crossref)
6
Aberdeen University Research Archive (AURA)
2
Canadian Science Publishing (via Crossref)
2
DRO - Deakin Research Online
2
Digital.CSIC (Spanish National Research Council)
1
Imperial College London: Spiral
1
Karger
1
Mary Ann Liebert, Inc., publishers
1
Open archive Norwegian University of Life Sciences: Brage NMBU
1
Oxford University Press
1
SAGE Publications
1
University of Waterloo, Canada: Institutional Repository
1