Content Provider
University College London: UCL Discovery
6
Directory of Open Access Journals: DOAJ Articles
4
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
3
Copernicus Publications: E-Journals
3
Niedersächsisches Online-Archiv NOA
3
Unknown
3
WikiBooks - Open-content textbooks
3
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
2
Institut national des sciences de l'Univers: HAL-INSU
2
Max Planck Society: MPG.PuRe
2
University of Leicester: Leicester Research Archive (LRA)
2
DataCite Metadata Store (German National Library of Science and Technology)
1
Defense Technical Information Center: DTIC Technical Reports database
1
German Aerospace Center: elib - DLR electronic library
1
National Institute of Polar Research Repository, Japan
1
Repositorio Geofísico Naciona del Perú
1
SMHI (Swedish Meteorological and Hydrological Institute): Vetenskapliga Publikationer (DiVA)
1
Sapienza Università di Roma: CINECA IRIS
1
The University of Manchester: Research Explorer
1
University of Leicester: Figshare
1
University of Naples Federico II ePrints Repository (FedOA)
1
University of Tromsø: Munin Open Research Archive
1
Université Grenoble Alpes: HAL
1
Université de Nantes: HAL-UNIV-NANTES
1