Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
5,470
PANGAEA - Data Publisher for Earth & Environmental Science
5,467
Digital.CSIC (Spanish National Research Council)
3
Springer Nature (via Crossref)
3
Copernicus Publications: E-Journals
2
Université de Genève: Archive ouverte UNIGE
2
AMAD - "Archivum Medii Aevi Digitale - Specialized open access repository for research in the middle ages"
1
ARCIMÍS (Archivo Climatológico y Meteorológico Institucional - AEMET, Agencia Estatal de Meteorología)
1
BORIS (Bern Open Repository and Information System, University of Bern)
1
IOP Publishing
1
Niedersächsisches Online-Archiv NOA
1
RIO: Repositorio Institucional Olavide (Pablo de Olavide University)
1
ScienceDirect (Elsevier - via Crossref)
1