Content Provider
Unknown
37
University of Copenhagen: Research
26
Arctic Portal Library
24
Aarhus University: Research
17
Open Research Library
14
UNESDOC - UNESCO Digital Library
11
Cambridge University Press
9
RePEc (Research Papers in Economics)
9
WikiBooks - Open-content textbooks
8
norden (Nordic Council of Ministers): Publications (DiVA)
8
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
7
LaCRIS - University of Lapland Current Research System
7
Falmouth University Research Repository (FURR)
6
Informa (via Crossref)
6
Oxford University Press
5
Oxford University Press (via Crossref)
5
ScholarSpace at University of Hawaii at Manoa
5
Springer Nature
5
Technical University of Denmark: DTU Orbit
5
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
4
Arctic Council Repository
4
DataCite Metadata Store (German National Library of Science and Technology)
4
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam)
4
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
4
Zenodo
4
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
3
JSTOR
3
Publication Database IASS (Institute for Advanced Sustainability Studies Potsdam)
3
British Museum Research Repository
2
De Gruyter
2
EconStor (German National Library of Economics, ZBW)
2
IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis)
2
IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository)
2
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
2
Lund University Publications (LUP)
2
PRISM - University of Calgary Digital Repository
2
Pensoft Publishers
2
Springer Nature (via Crossref)
2
Texas A&M University Digital Repository
2
The University of Manchester: Research Explorer
2
University of California: eScholarship
2
University of Groningen research database
2
University of Illinois at Urbana-Champaign: IDEALS (Illinois Digital Environment for Access to Learning and Scholarship)
2
University of North Texas: UNT Digital Library
2
University of Southampton: e-Prints Soton
2
Université de Nantes: HAL-UNIV-NANTES
2
Aalborg University's Research Portal
1
Aisberg - Archivio istituzionale dell'Università di Bergamo
1
Australian National University: ANU Digital Collections
1
Bath Spa University: ResearchSPAce
1
more ...