Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1
Directory of Open Access Journals: DOAJ Articles
1
Equinox Publishing
1
Frontiers (Publisher)
1
Frontiers: Figshare
1
NRC Digital Repository (National Research Council Canada)
1
National Research Council Canada: NRC Publications Archive
1
OLAC: Open Language Archives Community
1
Oxford University Press (via Crossref)
1
University of Alberta: Era - Education and Research Archive
1