Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
78
LeibnizOpen (The Leibniz Association)
63
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
58
Directory of Open Access Journals: DOAJ Articles
50
Digital.CSIC (Spanish National Research Council)
42
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons
40
Informa (via Crossref)
37
Unknown
30
Zenodo
27
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
26
Plymouth Marine Science Electronic Archive (PlyMSEA - Plymouth Marine Laboratory, PML)
22
Biodiversity Heritage Library (BHL)
21
Université de Nantes: HAL-UNIV-NANTES
21
University of St Andrews: Research Portal
20
University of California Press (via Crossref)
19
University of St Andrews: Digital Research Repository
19
PubMed Central (PMC)
18
The University of Queensland: UQ eSpace
15
Dryad Digital Repository (Duke University)
12
Nova Southeastern University: NSU Works
11
Central Marine Fisheries Research Institute, Kochi, India: Eprints@CMFRI
10
University of Liège: ORBi (Open Repository and Bibliography)
10
De Gruyter (via Crossref)
9
LAEI VL (Lithuanian Institute of Agrarian Economics Virtual Library)
8
LSRC VL (Lithuanian Social Research Centre Virtual Library)
8
Queen's University, Ontario: QSpace
8
Université de Genève: Archive ouverte UNIGE
8
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA)
7
University of Victoria (Canada): UVicDSpace
7
University of the Highlands and Islands: Research Database of UHI
7
Wageningen UR (University & Research Centre): Digital Library
7
theses.fr
7
HAL - Université de La Rochelle
6
Informa
6
Johns Hopkins University Press (via Crossref)
6
KRISHI Publication and Data Inventory Repository (Knowledge based Resources Information Systems Hub for Innovations in Agriculture - Indian Council of Agricultural Research, ICAR)
6
Kew Research Repository
6
Pensoft Publishers
6
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB
6
Aarhus University: Research
5
Arctic Council Repository
5
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
5
HELDA – University of Helsinki Open Repository
5
Norwegian Institute for Nature Research: Brage NINA
5
Opin vísindi (Iceland)
5
PANGAEA - Data Publisher for Earth & Environmental Science
5
Repositório Institucional da Universidade de Aveiro (RIA)
5
The University of Dublin, Trinity College: TARA (Trinity's Access to Research Archive)
5
University College Cork, Ireland: Cork Open Research Archive (CORA)
5
University of Groningen research database
5
more ...