Content Provider
Defense Technical Information Center: DTIC Technical Reports database
3,320
DataCite Metadata Store (German National Library of Science and Technology)
980
Directory of Open Access Journals: DOAJ Articles
830
Unknown
600
PANGAEA - Data Publisher for Earth & Environmental Science
444
Copernicus Publications: E-Journals
387
Wiley Online Library
338
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
265
Niedersächsisches Online-Archiv NOA
242
LeibnizOpen (The Leibniz Association)
184
MDPI Open Access Publishing
181
Université de Nantes: HAL-UNIV-NANTES
165
Institut national des sciences de l'Univers: HAL-INSU
159
Wiley Online Library (via Crossref)
131
PubMed Central (PMC)
123
Cambridge University Press
111
Université Savoie Mont Blanc: HAL
101
Canadian Science Publishing (via Crossref)
95
Université Grenoble Alpes: HAL
92
Vrije Universiteit Amsterdam (VU): Research Portal
81
National Research Council Canada: NRC Publications Archive
77
Zenodo
71
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
70
Canadian Science Publishing
69
University of Potsdam: publish.UP
66
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
65
University of Alaska: ScholarWorks@UA
59
University of Calgary Journal Hosting
56
Carleton University's Institutional Repository
54
ScienceDirect (Elsevier - via Crossref)
48
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
47
Aarhus University: Research
44
ETH Zürich Research Collection
44
Springer Nature (via Crossref)
44
Technical University of Denmark: DTU Orbit
43
University of North Texas: UNT Digital Library
41
Archives ouvertes de Paris-Saclay
40
University of Copenhagen: Research
36
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
35
Lund University Publications (LUP)
35
University of California: eScholarship
35
DIAL@USL-B (Université Saint-Louis, Bruxelles)
33
RERO DOC Digital Library
33
HAL Sorbonne Université
30
Theses Canada/Thèses Canada (Library and Archives Canada)
29
University of St Andrews: Research Portal
28
White Rose Research Online (Universities of Leeds, Sheffield & York)
27
Portail HAL-ANR (Agence Nationale de la Recherche)
26
Universidade de Lisboa: repositório.UL
26
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
25
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