Content Provider
Biodiversity Heritage Library (BHL)
1,270
WikiBooks - Open-content textbooks
349
Unknown
226
Cambridge University Press
214
Arctic Portal Library
205
Aarhus University: Research
155
University of Copenhagen: Research
95
LaCRIS - University of Lapland Current Research System
94
Springer Nature
78
Informa (via Crossref)
74
Oxford University Press (via Crossref)
64
VTT's Research Information Portal
64
Technical University of Denmark: DTU Orbit
60
JSTOR
49
RePEc (Research Papers in Economics)
48
UNESDOC - UNESCO Digital Library
47
norden (Nordic Council of Ministers): Publications (DiVA)
47
Springer Nature (via Crossref)
45
Open Research Library
41
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
32
De Gruyter
32
Aalborg University's Research Portal
31
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
31
DataCite Metadata Store (German National Library of Science and Technology)
30
Oxford University Press
25
University of Lapland: Lauda
25
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
23
The National Academies Press (via Crossref)
23
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto
20
Brill
19
Zenodo
19
Informa
18
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
17
Arctic Council Repository
16
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
15
IIASA DARE (Data Repository of the International Institute of Applied Systems Analysis)
15
IIASA PURE (International Institute of Applied Systems Analysis: PUblications REpository)
14
Roskilde University Research Portal (RUC)
14
Texas A&M University Digital Repository
13
University of Southampton: e-Prints Soton
13
American Museum of Natural History: AMNH scientific publications
12
Australian National University: ANU Digital Collections
12
Johns Hopkins University Press
12
University of Southern Denmark Research Portal
12
Université de Nantes: HAL-UNIV-NANTES
12
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer)
11
PRISM - University of Calgary Digital Repository
11
ScholarSpace at University of Hawaii at Manoa
11
JSTOR (via Crossref)
10
Lund University Publications (LUP)
10
more ...