Content Provider
PANGAEA - Data Publisher for Earth & Environmental Science
4,386
DataCite Metadata Store (German National Library of Science and Technology)
632
Institute for Marine Research: Brage IMR
234
Unknown
177
Directory of Open Access Journals: DOAJ Articles
170
Defense Technical Information Center: DTIC Technical Reports database
167
ScienceDirect (Elsevier - via Crossref)
108
University of Bergen: Bergen Open Research Archive (BORA-UiB)
106
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
104
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
81
LeibnizOpen (The Leibniz Association)
65
Wiley Online Library
64
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
63
Wiley Online Library (via Crossref)
62
HighWire Press (Stanford University)
60
NTNU Open Archive (Norwegian University of Science and Technology)
60
University of Tromsø: Munin Open Research Archive
60
Institut national des sciences de l'Univers: HAL-INSU
57
Copernicus Publications: E-Journals
54
Cambridge University Press
44
Université de Nantes: HAL-UNIV-NANTES
43
Springer Nature (via Crossref)
41
ScienceDirect (Elsevier)
40
University of Stavanger: UiS Brage
39
Niedersächsisches Online-Archiv NOA
38
Technical University of Denmark: DTU Orbit
33
PubMed Central (PMC)
32
Informa (via Crossref)
31
Oxford University Press
31
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
28
Natural Environment Research Council: NERC Open Research Archive
27
Oxford University Press (via Crossref)
27
HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
26
MDPI Open Access Publishing
25
Zenodo
25
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
24
University of Southampton: e-Prints Soton
23
HAL Sorbonne Université
21
University of the Highlands and Islands: Research Database of UHI
21
University of St Andrews: Research Portal
19
Informa
16
Digital.CSIC (Spanish National Research Council)
15
Max Planck Society: MPG.PuRe
15
Polar Research (E-Journal)
14
University of Copenhagen: Research
14
Biodiversity Heritage Library (BHL)
13
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server)
13
Archives ouvertes de Paris-Saclay
11
Hereon Publications (Helmholtz-Zentrum)
11
Lund University Publications (LUP)
11
more ...