Content Provider
LeibnizOpen (The Leibniz Association)
20
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
8
DataCite Metadata Store (German National Library of Science and Technology)
4
Stockholm University Press (via Crossref)
3
Unknown
3
Directory of Open Access Journals: DOAJ Articles
1
Niedersächsisches Online-Archiv NOA
1
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
1
ScienceDirect (Elsevier - via Crossref)
1
Springer Nature (via Crossref)
1
Stockholm University Press
1
York University, Toronto: YorkSpace
1