Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
58
ArXiv.org (Cornell University Library)
41
Curtin University: espace
18
Ghent University Academic Bibliography
16
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
14
DESY Publication Database (PUBDB)
11
KITopen (Karlsruhe Institute of Technologie)
10
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne)
9
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
5
Max Planck Society: MPG.PuRe
4
Université de Nantes: HAL-UNIV-NANTES
4
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
3
ScienceDirect (Elsevier - via Crossref)
3
Eldorado - Repositorium der TU Dortmund
2
Radboud University: DSpace
2
Unknown
2
CERN Document Server (CDS)
1
Cambridge University Press
1
DSpace@MIT (Massachusetts Institute of Technology)
1
IOP Publishing (via Crossref)
1
NASA Technical Reports Server (NTRS)
1
RWTH Aachen University: RWTH Publications
1
ScienceDirect (Elsevier)
1
Università degli Studi di Bari Aldo Moro: CINECA IRIS
1