Content Provider
Defense Technical Information Center: DTIC Technical Reports database
3,552
Directory of Open Access Journals: DOAJ Articles
3,397
DataCite Metadata Store (German National Library of Science and Technology)
2,972
PANGAEA - Data Publisher for Earth & Environmental Science
2,822
DataCite
2,750
Unknown
2,056
Wiley Online Library
1,690
Copernicus Publications: E-Journals
1,073
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
893
ScienceDirect (Elsevier)
800
Springer Nature (via Crossref)
769
MDPI Open Access Publishing
744
ScienceDirect (Elsevier - via Crossref)
743
PubMed Central (PMC)
679
Niedersächsisches Online-Archiv NOA
669
Université de Nantes: HAL-UNIV-NANTES
541
LeibnizOpen (The Leibniz Association)
498
Institut national des sciences de l'Univers: HAL-INSU
470
Université Savoie Mont Blanc: HAL
325
Université Grenoble Alpes: HAL
315
National Research Council Canada: NRC Publications Archive
307
Zenodo
293
Canadian Science Publishing
278
University of Copenhagen: Research
240
Vrije Universiteit Amsterdam (VU): Research Portal
238
Cambridge University Press
232
Informa
217
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
217
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences)
202
University of Alaska: ScholarWorks@UA
194
Lund University Publications (LUP)
181
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
173
Aarhus University: Research
169
University of Potsdam: publish.UP
162
University of Calgary Journal Hosting
161
Archives ouvertes de Paris-Saclay
156
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
142
ETH Zürich Research Collection
137
Carleton University's Institutional Repository
135
Technical University of Denmark: DTU Orbit
134
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
131
Canadian Science Publishing (via Crossref)
129
Max Planck Society: MPG.PuRe
129
Oxford University Press
129
Wageningen UR (University & Research Centre): Digital Library
129
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
128
DIAL@USL-B (Université Saint-Louis, Bruxelles)
124
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
117
Université Toulouse III - Paul Sabatier: HAL-UPS
114
Météo-France: HAL
113
more ...