Content Provider
Directory of Open Access Journals: DOAJ Articles
16
MDPI Open Access Publishing
13
Unknown
3
Charles University CU Digital repository
2
DataCite Metadata Store (German National Library of Science and Technology)
2
Institut national de la recherche scientifique, Québec: Espace INRS
2
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
Boise State University: Scholar Works
1
CINECA IRIS Universitá Degli Studi di Sassari
1
HAL Univ-Eiffel (Université Gustave Eiffel)
1
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
1
Mid Sweden University: Publications (DiVA)
1
National Cheng Kung University: NCKU Institutional Repository
1
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
1
ReData - University of Arizona Research Data Repository
1
The Czech Academy of Sciences: Publication Activity (ASEP)
1
University College London: UCL Discovery
1
University of Tromsø: Septentrio Academic Publishing
1
University of Victoria (Canada): UVicDSpace
1
VTT's Research Information Portal
1
uO Research (University of Ottawa - uOttawa)
1
École des Ponts ParisTech: HAL
1