Content Provider
Directory of Open Access Journals: DOAJ Articles
5
MDPI Open Access Publishing
3
University of St Andrews: Research Portal
2
Caltech Authors (California Institute of Technology)
1
Copernicus Publications: E-Journals
1
Guangzhou Institute of Geochemistry: GIG OpenIR (Chinese Academy of Sciences)
1
Institute for Marine Research: Brage IMR
1
Publikationsdatenbank der Fraunhofer-Gesellschaft
1
Repositório Institucional da Universidade de Aveiro (RIA)
1
Tomsk State University Research Library
1
University of Tasmania: UTas ePrints
1
Unknown
1