Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
1,203
University of Michigan: Digital Collections
56
Zenodo
56
Directory of Open Access Journals: DOAJ Articles
53
Unknown
48
University of Wisconsin, Milwaukee: UWM Libraries Digital Collections
36
PANGAEA - Data Publisher for Earth & Environmental Science
30
University of Tromsø: Munin Open Research Archive
30
Biodiversity Heritage Library (BHL)
28
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
22
Defense Technical Information Center: DTIC Technical Reports database
22
Arctic Data Center (via DataONE)
20
LeibnizOpen (The Leibniz Association)
20
Digital Repository of Scientific Institutes (RCIN)
19
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
17
Cambridge University Press
16
Institute for Marine Research: Brage IMR
15
National Institute of Polar Research Repository, Japan
15
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
15
Université de Nantes: HAL-UNIV-NANTES
14
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
12
PubMed Central (PMC)
11
Springer Nature (via Crossref)
11
Polar Research (E-Journal)
10
The University of Melbourne: Digitised Collections
10
Institut national des sciences de l'Univers: HAL-INSU
9
Wiley Online Library (via Crossref)
9
University of Groningen research database
8
Wiley Online Library
8
Dryad Digital Repository (Duke University)
7
University of Bergen: Bergen Open Research Archive (BORA-UiB)
7
University of Tromsø: Septentrio Academic Publishing
7
Informa (via Crossref)
6
Jagiellonian University Repository
6
MDPI Open Access Publishing
6
Open archive Norwegian University of Life Sciences: Brage NMBU
6
ScienceDirect (Elsevier - via Crossref)
6
Copernicus Publications: E-Journals
5
CyberLeninka (Scientific Electronic Library)
5
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
5
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
5
Magnolia press
5
NTNU Open Archive (Norwegian University of Science and Technology)
5
Norwegian Institute for Nature Research: Brage NINA
5
Norwegian Polar Data Centre
5
The Repository of the University of Silesia (RE-BUŚ)
5
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen)
4
Frontiers: Figshare
4
Hathi Trust Digital Library
4
KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences)
4
more ...