Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5,276
Defense Technical Information Center: DTIC Technical Reports database
3,552
Directory of Open Access Journals: DOAJ Articles
3,074
PANGAEA - Data Publisher for Earth & Environmental Science
2,596
Unknown
2,056
ScienceDirect (Elsevier - via Crossref)
1,067
Copernicus Publications: E-Journals
983
Wiley Online Library
936
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
893
Springer Nature (via Crossref)
769
MDPI Open Access Publishing
744
Niedersächsisches Online-Archiv NOA
652
PubMed Central (PMC)
632
Wiley Online Library (via Crossref)
563
Université de Nantes: HAL-UNIV-NANTES
536
LeibnizOpen (The Leibniz Association)
471
Institut national des sciences de l'Univers: HAL-INSU
444
ScienceDirect (Elsevier)
436
Université Savoie Mont Blanc: HAL
321
Université Grenoble Alpes: HAL
309
National Research Council Canada: NRC Publications Archive
305
Canadian Science Publishing (via Crossref)
264
Zenodo
241
University of Copenhagen: Research
238
Vrije Universiteit Amsterdam (VU): Research Portal
229
Cambridge University Press
223
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
214
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences)
191
University of Alaska: ScholarWorks@UA
186
Lund University Publications (LUP)
179
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
170
Aarhus University: Research
163
University of Calgary Journal Hosting
161
University of Potsdam: publish.UP
147
Informa (via Crossref)
143
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
139
Carleton University's Institutional Repository
135
Canadian Science Publishing
134
ETH Zürich Research Collection
133
Archives ouvertes de Paris-Saclay
132
Technical University of Denmark: DTU Orbit
126
Wageningen UR (University & Research Centre): Digital Library
126
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
121
Max Planck Society: MPG.PuRe
118
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
114
University of North Texas: UNT Digital Library
112
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
110
Université Toulouse III - Paul Sabatier: HAL-UPS
110
Météo-France: HAL
109
University of California: eScholarship
109
more ...