Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
9,392
Directory of Open Access Journals: DOAJ Articles
865
Unknown
649
PubMed Central (PMC)
471
Wiley Online Library
458
Zenodo
364
LeibnizOpen (The Leibniz Association)
243
University of Nebraska-Lincoln: DigitalCommons@UNL
210
Wiley Online Library (via Crossref)
180
Springer Nature (via Crossref)
178
MDPI Open Access Publishing
150
PANGAEA - Data Publisher for Earth & Environmental Science
129
Frontiers: Figshare
124
Dryad Digital Repository (Duke University)
109
Utah State University: DigitalCommons@USU
104
ScienceDirect (Elsevier - via Crossref)
103
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
99
Biodiversity Heritage Library (BHL)
98
Digital.CSIC (Spanish National Research Council)
92
University of California: eScholarship
92
University of Michigan: Digital Collections
87
BioOne Online Journals
80
HighWire Press (Stanford University)
80
Canadian Science Publishing
79
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
79
ScienceDirect (Elsevier)
72
Høgskolen i Innlandet: Brage INN
71
Université de Nantes: HAL-UNIV-NANTES
66
Michigan Technological University: Digital Commons @ Michigan Tech
65
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System)
64
The Canadian Field-Naturalist (E-Journal)
64
Canadian Science Publishing (via Crossref)
63
The University of Queensland: UQ eSpace
56
PLOS
52
Aarhus University: Research
51
Sapienza Università di Roma: CINECA IRIS
51
Cambridge University Press
49
Swedish University of Agricultural Sciences: Epsilon Archive for Student Projects
49
Oxford University Press
47
Charles University CU Digital repository
45
RePEc (Research Papers in Economics)
44
Universidade Estadual Paulista São Paulo: Repositório Institucional UNESP
43
The Royal Society: Figshare
42
ARPI - Archivio della Ricerca dell'Università di Pisa
40
Frontiers (Publisher)
38
University of Southern Queensland: USQ ePrints
38
Aalborg University's Research Portal
37
Natural Resources Institute Finland: Jukuri
36
Repository of the University of Ljubljana (RUL)
36
The Royal Society
36
more ...