Content Provider
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Cambridge University Press (via Crossref)
106
The Royal Society
101
Arctic Portal Library
99
The University of Adelaide: Digital Library
99
University College London: UCL Discovery
98
Ghent University Academic Bibliography
96
Universidad de Chile: Repositorio académico
93
École Polytechnique, Université Paris-Saclay: HAL
91
Australian National University: ANU Digital Collections
90
Hathi Trust Digital Library
89
University of East Anglia: UEA Digital Repository
89
DSpace@MIT (Massachusetts Institute of Technology)
86
Wiley Online Library (via Crossref)
84
Northumbria University, Newcastle: Northumbria Research Link (NRL)
83
Caltech Authors (California Institute of Technology)
81
Padua Research Archive (IRIS - Università degli Studi di Padova)
80
University of Bristol: Bristol Research
79
Oxford University Press (via Crossref)
77
University of Groningen research database
72
ORA - Oxford University Research Archive
70
Université de Bretagne Occidentale: HAL
69
Archives ouvertes de Paris-Saclay
65
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ
64
WikiBooks - Open-content textbooks
64
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP)
63
Polar Research (E-Journal)
63
ARPI - Archivio della Ricerca dell'Università di Pisa
62
BORIS (Bern Open Repository and Information System, University of Bern)
62
University of Cape Town: OpenUCT
62
HAL Sorbonne Université
61
KITopen (Karlsruhe Institute of Technologie)
61
NIOZ Repository (Royal Netherlands Institute for Sea Research)
61
DIAL@UCLouvain (Université catholique de Louvain)
60
DataCite
60
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
60
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR
60
University of Pretoria: UPSpace
59
The University of Waikato: Research Commons
58
Università degli Studi di Napoli "Parthenope": CINECA IRIS
58
ETH Zürich Research Collection
57
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen)
57
Università Politecnica delle Marche: IRIS
57
IRUA - Institutional Repository van de Universiteit Antwerpen
54
Informa
54
University of Calgary Journal Hosting
54
Columbia University: Academic Commons
53
University of Western Sydney (UWS): Research Direct
53
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste)
53
Lund University Publications (LUP)
52
HAL - Université de La Rochelle
51
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