Content Provider
WikiBooks - Open-content textbooks
24
RePEc (Research Papers in Economics)
21
Unknown
21
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
16
Biodiversity Heritage Library (BHL)
6
University of Copenhagen: Research
5
Cambridge University Press
4
UNESDOC - UNESCO Digital Library
4
Open Research Library
3
Technical University of Denmark: DTU Orbit
3
Arctic Council Repository
2
Arctic Portal Library
2
Falmouth University Research Repository (FURR)
2
Oxford University Press (via Crossref)
2
UQAM - Université du Québec à Montréal: archipel
2
Université de Nantes: HAL-UNIV-NANTES
2
Aalborg University's Research Portal
1
Aarhus University: Research
1
Australian National University: ANU Digital Collections
1
CQUniversity: acquire
1
Charles Darwin University: CDU eSpace
1
Cornell University: eCommons@Cornell
1
Danish Defense Research Portal
1
James Cook University, Australia: ResearchOnline@JCU
1
LaCRIS - University of Lapland Current Research System
1
Macquarie University Research Portal
1
Monash University: Figshare
1
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel)
1
PRISM - University of Calgary Digital Repository
1
Springer Nature (via Crossref)
1
Sycamore Scholars at Indiana State University
1
University College London: UCL Discovery
1
University of Southampton: e-Prints Soton
1
University of the Highlands and Islands: Research Database of UHI
1
ZHAW digitalcollection (Repository of the Zurich University of Applied Sciences)
1