Content Provider
LeibnizOpen (The Leibniz Association)
19
Unknown
3
DataCite Metadata Store (German National Library of Science and Technology)
2
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
Niedersächsisches Online-Archiv NOA
1
Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
1
Universidad Complutense de Madrid (UCM): E-Prints Complutense
1
Université de Nantes: HAL-UNIV-NANTES
1