Content Provider
ArXiv.org (Cornell University Library)
5
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
4
Directory of Open Access Journals: DOAJ Articles
4
MDPI Open Access Publishing
2
BioMed Central
1
DataCite Metadata Store (German National Library of Science and Technology)
1
Dialnet - Portada de revistas (Universidad de La Rioja)
1
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia)
1
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications
1
Smithsonian Institution: Figshare
1
Universidad del Rosario, Bogotá: Portal de Revistas UR
1
University of Groningen research database
1
University of Puget Sound: Sound Ideas
1
Unknown
1