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DataCite Metadata Store (German National Library of Science and Technology)
2
eSpace - Manchester Metropolitan University's Research Repository
2
Balıkesir University Institutional Repository (DSpace@Balıkesir)
1
Copernicus Publications: E-Journals
1
Niedersächsisches Online-Archiv NOA
1
The University of Manchester: Research Explorer
1
University of Bristol: Bristol Research
1
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