Content Provider
Biodiversity Heritage Library (BHL)
6
DataCite Metadata Store (German National Library of Science and Technology)
6
Directory of Open Access Journals: DOAJ Articles
3
HELDA – University of Helsinki Open Repository
3
OPUS - Publication Server of the University of Stuttgart
2
Cologne University: KUPS
1
Contributions to Entomology = Beiträge zur Entomologie (E-Journal)
1
DigiZeitschriften: The German digital journal archive (Göttingen University Library)
1
Freie Universität Berlin: Refubium (FU Berlin)
1
Unknown
1