Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
155
Directory of Open Access Journals: DOAJ Articles
73
LeibnizOpen (The Leibniz Association)
58
University of Tromsø: Munin Open Research Archive
42
NTNU Open Archive (Norwegian University of Science and Technology)
36
Unknown
36
Copernicus Publications: E-Journals
35
Universitet i Oslo: Digitale utgivelser ved UiO (DUO)
32
Niedersächsisches Online-Archiv NOA
29
University of Bergen: Bergen Open Research Archive (BORA-UiB)
26
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
22
PANGAEA - Data Publisher for Earth & Environmental Science
20
Institut national des sciences de l'Univers: HAL-INSU
15
National Institute of Polar Research Repository, Japan
14
Zenodo
13
Cambridge University Press
11
Norwegian Geotechnical Institute (NGI) Digital Archive
11
Open archive Norwegian University of Life Sciences: Brage NMBU
10
Vrije Universiteit Amsterdam (VU): Research Portal
9
PubMed Central (PMC)
8
SINTEF Open (Brage)
8
IRIS Università degli Studi di Napoli Federico II
7
University College London: UCL Discovery
7
Université de Nantes: HAL-UNIV-NANTES
7
Uppsala University: Publications (DiVA)
7
NILU – Norwegian Institute for Air Research: NILU Brage
6
Wiley Online Library
6
Digital.CSIC (Spanish National Research Council)
5
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
5
MDPI Open Access Publishing
5
Open archive Nord universitet
5
University of Stavanger: UiS Brage
5
Wiley Online Library (via Crossref)
5
Institute for Marine Research: Brage IMR
4
Luleå University of Technology Publications (DiVA)
4
Sapienza Università di Roma: CINECA IRIS
4
Springer Nature (via Crossref)
4
University of Tromsø: Septentrio Academic Publishing
4
ADORA - Oslo School of Architecture and Design
3
Aarhus University: Research
3
Apollo - University of Cambridge Repository
3
Arctic Portal Library
3
Canadian Science Publishing (via Crossref)
3
De Gruyter (via Crossref)
3
Defense Technical Information Center: DTIC Technical Reports database
3
ETH Zürich Research Collection
3
Hindawi Publishing Corporation
3
Informa (via Crossref)
3
Max Planck Society: MPG.PuRe
3
NGU Open Archive (Geological Survey of Norway)
3
more ...