Content Provider
Defense Technical Information Center: DTIC Technical Reports database
3
Copernicus Publications: E-Journals
1
DataCite Metadata Store (German National Library of Science and Technology)
1
Directory of Open Access Journals: DOAJ Articles
1
MDPI Open Access Publishing
1
Niedersächsisches Online-Archiv NOA
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
PANGAEA - Data Publisher for Earth & Environmental Science
1
Polar Research (E-Journal)
1
Springer Nature (via Crossref)
1
University of Bergen: Bergen Open Research Archive (BORA-UiB)
1