Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
122
PANGAEA - Data Publisher for Earth & Environmental Science
37
Unknown
31
Directory of Open Access Journals: DOAJ Articles
24
Natural Environment Research Council: NERC Open Research Archive
24
Arctic Data Center (via DataONE)
23
Cambridge University Press
21
Copernicus Publications: E-Journals
21
Zenodo
17
Wiley Online Library
16
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
12
Niedersächsisches Online-Archiv NOA
12
Technical University of Denmark: DTU Orbit
12
University of St Andrews: Research Portal
12
Durham University: Durham Research Online
11
Research Data Australia (Australian National Data Service - ANDS)
11
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
10
University of Copenhagen: Research
10
University of Glasgow: Enlighten - Publications
9
Aarhus University: Research
8
Defense Technical Information Center: DTIC Technical Reports database
8
Institut national des sciences de l'Univers: HAL-INSU
8
Frontiers: Figshare
7
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
7
Lund University Publications (LUP)
7
The University of Manchester: Research Explorer
7
WikiBooks - Open-content textbooks
7
Wiley Online Library (via Crossref)
7
German Aerospace Center: elib - DLR electronic library
6
University of Calgary Journal Hosting
6
Utrecht University Repository
6
White Rose Research Online (Universities of Leeds, Sheffield & York)
6
Edinburgh Research Archive (ERA - University of Edinburgh)
5
ScienceDirect (Elsevier - via Crossref)
5
University of St Andrews: Digital Research Repository
5
Université de Nantes: HAL-UNIV-NANTES
5
Anagrafe della Ricerca d'Ateneo (Universitá degli studi Roma Tre)
4
Canadian Science Publishing
4
Durham University: Durham e-Theses
4
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
4
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
4
NASA Technical Reports Server (NTRS)
4
The University of Maine: DigitalCommons@UMaine
4
Uppsala University: Publications (DiVA)
4
Érudit.org (Université Montréal)
4
ArXiv.org (Cornell University Library)
3
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3
Cambridge University Press (via Crossref)
3
Canadian Science Publishing (via Crossref)
3
Ohio State University (OSU): Knowledge Bank
3
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