Content Provider
Directory of Open Access Journals: DOAJ Articles
64
Springer Nature (via Crossref)
25
ScienceDirect (Elsevier - via Crossref)
17
Unknown
11
Brill (via Crossref)
9
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
8
The Royal Society (via Crossref)
8
Frontiers: Figshare
7
Canadian Science Publishing (via Crossref)
5
Ovid (via Crossref)
5
University of Wollongong, Australia: Research Online
5
IOP Publishing (via Crossref)
3
Informa (via Crossref)
3
ScienceDirect (Elsevier)
3
BORIS (Bern Open Repository and Information System, University of Bern)
2
Brill
2
DataCite Metadata Store (German National Library of Science and Technology)
2
Frontiers (Publisher)
2
NORA (National aggregator of open repositories of Russian universities)
2
Oxford University Press
2
PeerJ Publishing (via CrossRef)
2
Stockholm University Press (via Crossref)
2
Washington State University: WSU Libraries Digital Collections
2
Cambridge University Press
1
Cambridge University Press (via Crossref)
1
IOP Publishing
1
Johns Hopkins University Press
1
Lund University Publications (LUP)
1
Nova Southeastern University: NSU Works
1
Oxford University Press (via Crossref)
1
PeerJ Publishing
1
PennState, The Dickinson School of Law: Penn State Law eLibrary
1
Santa Clara University: Scholar Commons
1
The University of Milan: Archivio Istituzionale della Ricerca (AIR)
1
University of Calgary Journal Hosting
1
University of Nebraska-Lincoln: DigitalCommons@UNL
1
Wiley Online Library
1
Wiley Online Library (via Crossref)
1