Content Provider
Springer Nature (via Crossref)
25
Imperial College London: Spiral
5
The University of Queensland: UQ eSpace
3
Universidad de Chile: Repositorio académico
2
University College London: UCL Discovery
2
University of the Highlands and Islands: Research Database of UHI
2
AAAS Resource Center (American Association for the Advancement of Science)
1
Institute of Earth Environment: IEECAS OpenIR (Chinese Academy of Sciences)
1
ScienceDirect (Elsevier - via Crossref)
1
University of Nottingham: Repository@Nottingham
1
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca)
1
Université de Lausanne (UNIL): Serval - Serveur académique lausannois
1