Content Provider
Directory of Open Access Journals: DOAJ Articles
3,260
ScienceDirect (Elsevier - via Crossref)
1,068
Unknown
1,057
Wiley Online Library
1,049
DataCite Metadata Store (German National Library of Science and Technology)
924
Springer Nature (via Crossref)
780
RePEc (Research Papers in Economics)
736
Niedersächsisches Online-Archiv NOA
653
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
549
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
537
Wiley Online Library (via Crossref)
492
ScienceDirect (Elsevier)
436
LeibnizOpen (The Leibniz Association)
428
University of California: eScholarship
375
Université de Nantes: HAL-UNIV-NANTES
344
Institut national des sciences de l'Univers: HAL-INSU
334
IOP Publishing (via Crossref)
276
Canadian Science Publishing (via Crossref)
249
Cambridge University Press
224
University of Copenhagen: Research
207
Frontiers (Publisher)
204
Vrije Universiteit Amsterdam (VU): Research Portal
204
IOP Publishing
174
National Research Council Canada: NRC Publications Archive
170
Informa (via Crossref)
167
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
165
Canadian Science Publishing
164
Max Planck Society: MPG.PuRe
163
University of Calgary Journal Hosting
161
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
154
Université Grenoble Alpes: HAL
147
Lund University Publications (LUP)
146
Aarhus University: Research
141
Université Savoie Mont Blanc: HAL
139
Zenodo
139
Informa
136
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
134
Wageningen UR (University & Research Centre): Digital Library
119
Carleton University's Institutional Repository
113
NORA (National aggregator of open repositories of Russian universities)
113
University of Potsdam: publish.UP
110
Archives ouvertes de Paris-Saclay
105
Oxford University Press
96
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
94
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
92
ETH Zürich Research Collection
90
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences)
85
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
85
Météo-France: HAL
80
Tomsk State University Research Library
80
more ...