Content Provider
Defense Technical Information Center: DTIC Technical Reports database
328
DataCite Metadata Store (German National Library of Science and Technology)
132
Directory of Open Access Journals: DOAJ Articles
96
Unknown
71
PANGAEA - Data Publisher for Earth & Environmental Science
69
University of Alaska: ScholarWorks@UA
51
Wiley Online Library
50
Copernicus Publications: E-Journals
45
DataCite
30
Niedersächsisches Online-Archiv NOA
28
University of North Texas: UNT Digital Library
24
University of Calgary Journal Hosting
23
LeibnizOpen (The Leibniz Association)
21
MDPI Open Access Publishing
19
PubMed Central (PMC)
14
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
13
Cambridge University Press
12
University of Potsdam: publish.UP
11
Canadian Science Publishing
10
Institut national des sciences de l'Univers: HAL-INSU
10
University of California: eScholarship
9
Université de Nantes: HAL-UNIV-NANTES
9
Archives ouvertes de Paris-Saclay
5
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
5
Ohio State University (OSU): Knowledge Bank
5
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive
5
Université Grenoble Alpes: HAL
5
Zenodo
5
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
4
The University of Texas at Austin: Texas ScholarWorks
4
USRA Houston Repository (Universities Space Research Association)
4
Université Savoie Mont Blanc: HAL
4
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
3
Carleton University's Institutional Repository
3
DIAL@UCLouvain (Université catholique de Louvain)
3
DIAL@USL-B (Université Saint-Louis, Bruxelles)
3
HAL Sorbonne Université
3
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
3
HELDA – University of Helsinki Open Repository
3
National Research Council Canada: NRC Publications Archive
3
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
3
PQDT Open: Open Access Dissertations and Theses (ProQuest)
3
Technical University of Denmark: DTU Orbit
3
The Royal Society
3
University of Southampton: e-Prints Soton
3
University of Texas at El Paso: Digital Commons@UTEP
3
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
3
uO Research (University of Ottawa - uOttawa)
3
Aarhus University: Research
2
Canadian Science Publishing (via Crossref)
2
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