Content Provider
LeibnizOpen (The Leibniz Association)
19
WikiBooks - Open-content textbooks
12
Unknown
10
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
8
Directory of Open Access Journals: DOAJ Articles
8
Copernicus Publications: E-Journals
5
Institut national des sciences de l'Univers: HAL-INSU
5
Washington State University: WSU Libraries Digital Collections
5
Niedersächsisches Online-Archiv NOA
4
PANGAEA - Data Publisher for Earth & Environmental Science
2
Université de Nantes: HAL-UNIV-NANTES
2
CERN Document Server (CDS)
1
Cambridge University Press
1
Columbia University: Academic Commons
1
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB)
1
German Aerospace Center: elib - DLR electronic library
1
HAL Sorbonne Université
1
Hathi Trust Digital Library
1
Hereon Publications (Helmholtz-Zentrum)
1
NILU – Norwegian Institute for Air Research: NILU Brage
1
North Dakota State University (NDSU): Digital Horizons
1
Open Research Library
1
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
1
SciELO Brazil (Scientific Electronic Library Online)
1
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
1
University of Calgary Journal Hosting
1
University of Washington, Seattle: Digital Collections
1
University of the Pacific, McGeorge School of Law: Scholarly Commons
1
University of the Pacific: Scholarly Commons
1
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
1