Content Provider
LeibnizOpen (The Leibniz Association)
20
Defense Technical Information Center: DTIC Technical Reports database
13
DataCite Metadata Store (German National Library of Science and Technology)
11
PANGAEA - Data Publisher for Earth & Environmental Science
9
Unknown
6
Directory of Open Access Journals: DOAJ Articles
5
DIAL@USL-B (Université Saint-Louis, Bruxelles)
4
UNEP Document Repository (UN Environment Programme)
4
UNESDOC - UNESCO Digital Library
4
University of North Texas: UNT Digital Library
4
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
3
University of Calgary Journal Hosting
3
Digital Commons @ American University Washington College of Law
2
Frontiers: Figshare
2
HELDA – University of Helsinki Open Repository
2
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences)
2
MDPI Open Access Publishing
2
Open Research Library
2
Qatar University: QU Institutional Repository
2
University of Tasmania: UTas ePrints
2
Université de Nantes: HAL-UNIV-NANTES
2
Aarhus University: Research
1
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
1
California State University (CSU): DSpace
1
Carleton College: Digital Commons
1
CyberLeninka (Scientific Electronic Library)
1
Digital Collections of Colorado (Colorado State University)
1
Georgia Institute of Technology: SMARTech - Scholarly Materials and Research at Georgia Tech
1
HAL Clermont Auvergne (Université Blaise Pascal Clermont-Ferrand/Université d'Auvergne)
1
HAL Réseau National des Maisons des Sciences de l'Homme
1
HAL Sorbonne Université
1
ITU Academic Open Archive
1
Institut national des sciences de l'Univers: HAL-INSU
1
Jagiellonian University Repository
1
Journals at the University of Arizona
1
LaCRIS - University of Lapland Current Research System
1
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
1
Mountain Scholar (Digital Collections of Colorado and Wyoming)
1
MédiHAL
1
Old Dominion University: ODU Digital Commons
1
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
1
RIUMA - Repositorio Institucional de la Universidad de Málaga
1
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
1
SINTEF Open (Brage)
1
Schulich Scholars (Schulich School of Law, Dalhousie University)
1
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
1
Science Data Bank (ScienceDB)
1
Universidade Federal do Rio Grande do Sul (UFRGS): Lume
1
University of California: eScholarship
1
University of Copenhagen: Research
1
more ...