Content Provider
Defense Technical Information Center: DTIC Technical Reports database
124
LeibnizOpen (The Leibniz Association)
41
Unknown
37
DataCite Metadata Store (German National Library of Science and Technology)
34
Directory of Open Access Journals: DOAJ Articles
33
Wiley Online Library
23
Copernicus Publications: E-Journals
20
Wiley Online Library (via Crossref)
13
PANGAEA - Data Publisher for Earth & Environmental Science
12
Cambridge University Press
11
Niedersächsisches Online-Archiv NOA
11
PubMed Central (PMC)
10
Aarhus University: Research
8
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
8
University of St Andrews: Research Portal
7
Université de Nantes: HAL-UNIV-NANTES
7
Institut national des sciences de l'Univers: HAL-INSU
6
National Institute of Polar Research Repository, Japan
6
University of California: eScholarship
6
University of Tromsø: Munin Open Research Archive
6
Vrije Universiteit Amsterdam (VU): Research Portal
6
Technical University of Denmark: DTU Orbit
5
EPHE (Ecole pratique des hautes études, Paris): HAL
4
Ghent University Academic Bibliography
4
Lund University Publications (LUP)
4
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
4
Ohio State University (OSU): Knowledge Bank
4
University of St Andrews: Digital Research Repository
4
University of Waterloo, Canada: Institutional Repository
4
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3
Archives ouvertes de Paris-Saclay
3
Canadian Science Publishing (via Crossref)
3
De Gruyter (via Crossref)
3
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
3
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
3
LaCRIS - University of Lapland Current Research System
3
Max Planck Society: MPG.PuRe
3
Memorial University of Newfoundland: Research Repository
3
Polar Research (E-Journal)
3
USRA Houston Repository (Universities Space Research Association)
3
University of British Columbia: cIRcle - UBC's Information Repository
3
University of Copenhagen: Research
3
University of North Texas: UNT Digital Library
3
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
3
Utrecht University Repository
3
White Rose Research Online (Universities of Leeds, Sheffield & York)
3
Zenodo
3
Aix-Marseille Université: HAL
2
Akademicka Platforma Czasopism
2
Akademicka Platforma Czasopism (APCZ)
2
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