Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
6,186
Directory of Open Access Journals: DOAJ Articles
3,603
Defense Technical Information Center: DTIC Technical Reports database
3,552
DataCite
3,104
PANGAEA - Data Publisher for Earth & Environmental Science
2,822
Unknown
2,691
Arctic Data Center (via DataONE)
2,247
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
2,052
Wiley Online Library
1,818
Copernicus Publications: E-Journals
1,073
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1,021
Springer Nature (via Crossref)
931
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
838
ScienceDirect (Elsevier)
836
Zenodo
820
ScienceDirect (Elsevier - via Crossref)
778
RePEc (Research Papers in Economics)
752
MDPI Open Access Publishing
744
PubMed Central (PMC)
679
Niedersächsisches Online-Archiv NOA
669
Université de Nantes: HAL-UNIV-NANTES
632
LeibnizOpen (The Leibniz Association)
520
Institut national des sciences de l'Univers: HAL-INSU
505
IOP Publishing
474
CyberLeninka (Scientific Electronic Library)
436
University of California: eScholarship
417
Dryad Digital Repository (Duke University)
388
Université Grenoble Alpes: HAL
387
Université Savoie Mont Blanc: HAL
386
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
354
National Research Council Canada: NRC Publications Archive
316
Canadian Science Publishing
288
University of Alaska: ScholarWorks@UA
287
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
281
Frontiers: Figshare
269
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences)
262
Informa
259
Cambridge University Press
250
University of Copenhagen: Research
250
Vrije Universiteit Amsterdam (VU): Research Portal
243
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
236
Frontiers (Publisher)
213
Max Planck Society: MPG.PuRe
200
Aarhus University: Research
185
Lund University Publications (LUP)
183
ESS-DIVE: Deep Insight for Earth Science Data (via DataONE)
178
NASA Technical Reports Server (NTRS)
175
University of Potsdam: publish.UP
164
Archives ouvertes de Paris-Saclay
163
University of Calgary Journal Hosting
161
more ...