Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5
Defense Technical Information Center: DTIC Technical Reports database
3
University of Copenhagen: Research
2
Unknown
2
Zenodo
2
Aarhus University: Research
1
DIAL@UCLouvain (Université catholique de Louvain)
1
DIAL@USL-B (Université Saint-Louis, Bruxelles)
1
Directory of Open Access Journals: DOAJ Articles
1
Georgia Institute of Technology: SMARTech - Scholarly Materials and Research at Georgia Tech
1
National Institute of Polar Research Repository, Japan
1
Polar Research
1
Royal Holloway University of London: Royal Holloway Digital Repository
1
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca)
1