Content Provider
Defense Technical Information Center: DTIC Technical Reports database
124
LeibnizOpen (The Leibniz Association)
41
Wiley Online Library
39
Unknown
37
DataCite Metadata Store (German National Library of Science and Technology)
34
Directory of Open Access Journals: DOAJ Articles
33
Copernicus Publications: E-Journals
20
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
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
Vrije Universiteit Amsterdam (VU): Research Portal
4
Wiley Online Library (via Crossref)
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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