Content Provider
LeibnizOpen (The Leibniz Association)
19
University of California: eScholarship
5
Geological Society of London: Figshare
3
Unknown
2
Wageningen UR (University & Research Centre): Digital Library
2
Aberdeen University Research Archive (AURA)
1
DataCite Metadata Store (German National Library of Science and Technology)
1
Directory of Open Access Journals: DOAJ Articles
1
OhioLINK: Electronic Theses and Dissertations Center
1
PANGAEA - Data Publisher for Earth & Environmental Science
1
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
1
The University of Texas at Austin: Texas ScholarWorks
1
University of Wollongong, Australia: Research Online
1
Università degli Studi di Milano-Bicocca: BOA (Bicocca Open Archive)
1
Utrecht University Repository
1