Content Provider
Directory of Open Access Journals: DOAJ Articles
4
Hereon Publications (Helmholtz-Zentrum)
3
DataCite Metadata Store (German National Library of Science and Technology)
2
German Aerospace Center: elib - DLR electronic library
1
LaCRIS - University of Lapland Current Research System
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
1
University of Groningen research database
1
Unknown
1