Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
724
Digital.CSIC (Spanish National Research Council)
6
Instituto Español de Oceanografía: e-IEO
6
PANGAEA - Data Publisher for Earth & Environmental Science
2
Zenodo
2
BioOne Online Journals
1
Cardiff University: ORCA (Online Research @ Cardiff)
1
Defense Technical Information Center: DTIC Technical Reports database
1
Directory of Open Access Journals: DOAJ Articles
1
HighWire Press (Stanford University)
1
Newcastle University Library ePrints Service
1
ORA - Oxford University Research Archive
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
Oxford University Press (via Crossref)
1
Pensoft Publishers
1
SERPENT Media Archive (Scientific and Environmental ROV Partnership using Existing iNdustrial Technology)
1
The University of Maine: DigitalCommons@UMaine
1
UTSA Digital Collections (The University of Texas at San Antonio)
1
University of Gloucestershire: Research Repository
1
University of Illinois at Urbana-Champaign: IDEALS (Illinois Digital Environment for Access to Learning and Scholarship)
1
University of St Andrews: Digital Research Repository
1
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
1