Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
581
Directory of Open Access Journals: DOAJ Articles
539
Unknown
372
National Institute of Polar Research Repository, Japan
285
PANGAEA - Data Publisher for Earth & Environmental Science
269
Defense Technical Information Center: DTIC Technical Reports database
241
Natural Environment Research Council: NERC Open Research Archive
240
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
234
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
213
Institut national des sciences de l'Univers: HAL-INSU
187
Copernicus Publications: E-Journals
183
Niedersächsisches Online-Archiv NOA
165
Université de Nantes: HAL-UNIV-NANTES
107
LeibnizOpen (The Leibniz Association)
101
HighWire Press (Stanford University)
100
Indian Institute of Geomagnetism (IIG): Repository
73
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
71
ScienceDirect (Elsevier - via Crossref)
71
Research Data Australia (Australian National Data Service - ANDS)
63
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires)
59
NASA Technical Reports Server (NTRS)
54
Springer Nature (via Crossref)
52
Lund University Publications (LUP)
51
Canadian Science Publishing (via Crossref)
50
University of Leicester: Leicester Research Archive (LRA)
50
Jultika - University of Oulu repository
49
ArXiv.org (Cornell University Library)
47
Université de Paris: Portail HAL
39
University of Southampton: e-Prints Soton
38
Lancaster University: Lancaster Eprints
37
University of Leicester: Figshare
37
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
37
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
36
Annals of Geophysics (INGV, Istituto Nazionale di Geofisica e Vulcanologia)
34
CyberLeninka (Scientific Electronic Library)
34
HAL Sorbonne Université
34
University of Michigan: Deep Blue
34
University of Tromsø: Munin Open Research Archive
33
MDPI Open Access Publishing
32
Cambridge University Press
31
University College London: UCL Discovery
30
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
29
PubMed Central (PMC)
29
Digital.CSIC (Spanish National Research Council)
27
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research)
27
Australian National University: ANU Digital Collections
26
Swedish National Data Service (SND)
26
Technical University of Denmark: DTU Orbit
26
University of California: eScholarship
26
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
25
more ...