Content Provider
ScienceDirect (Elsevier - via Crossref)
18
Frontiers: Figshare
17
Directory of Open Access Journals: DOAJ Articles
16
Unknown
11
KovsieScholar Repository (University of the Free State - UFS UV)
8
Arctic Data Center (via DataONE)
4
ScienceDirect (Elsevier)
4
DataCite Metadata Store (German National Library of Science and Technology)
2
Frontiers (Publisher)
2
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
2
Bangor University: Research Portal
1
Informa (via Crossref)
1
Old Dominion University: ODU Digital Commons
1
Purdue University: e-Pubs
1
SMHI (Swedish Meteorological and Hydrological Institute): Vetenskapliga Publikationer (DiVA)
1
Springer Nature (via Crossref)
1
University of South Carolina Libraries: Scholar Commons
1
Wiley Online Library (via Crossref)
1