Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
526
APS Digital Library (American Philosophical Society)
99
Directory of Open Access Journals: DOAJ Articles
47
Unknown
34
Oklahoma State University: Digital Collections @ OKSTATE Library
23
Memorial University of Newfoundland: Digital Archives Initiative (DAI)
22
University of Lethbridge Digitized Collections
22
North Dakota State University (NDSU): Digital Horizons
21
Copernicus Publications: E-Journals
15
Niedersächsisches Online-Archiv NOA
14
MDPI Open Access Publishing
13
RePEc (Research Papers in Economics)
11
The University of Utah: J. Willard Marriott Digital Library
8
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
7
Research Data Australia (Australian National Data Service - ANDS)
6
Wiley Online Library
6
Columbia University: Academic Commons
5
Duke University Libraries: DukeSpace
5
IMHE OpenIR (Institute of Mountain Hazards and Environment, Chinese Academy of Sciences)
5
Natural Environment Research Council: NERC Open Research Archive
5
the Digital Archaeological Record (via DataONE)
5
NHH Brage Open institutional repository (Norwegian School of Economics)
4
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
4
Texas A&M University Digital Repository
4
The University of Adelaide: Digital Library
4
Cambridge University Press
3
Digital Commons University of South Florida (USF)
3
Florida State University: DigiNole Commons
3
Hunter Library Digital Collections (Western Carolina University)
3
Knowledge Network for Biocomplexity (via DataONE)
3
Ohio State University (OSU): Knowledge Bank
3
Theses Canada/Thèses Canada (Library and Archives Canada)
3
University of South Florida St. Petersburg: Digital USFSP
3
University of the Pacific, McGeorge School of Law: Scholarly Commons
3
University of the Pacific: Scholarly Commons
3
Université de Nantes: HAL-UNIV-NANTES
3
eCite UTAS (University of Tasmania)
3
AgEcon Search - Research in Agricultural & Applied Economics
2
Arctic Data Center (via DataONE)
2
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
2
Digital Repository @ Iowa State University
2
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System)
2
Institut national de la recherche scientifique, Québec: Espace INRS
2
Institut national des sciences de l'Univers: HAL-INSU
2
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
2
Irstea Publications et Bases documentaires (Irstea@doc/CemOA)
2
Jultika - University of Oulu repository
2
Memorial University of Newfoundland: Research Repository
2
National Institute of Polar Research Repository, Japan
2
Opin vísindi (Iceland)
2
more ...