Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
72
ArXiv.org (Cornell University Library)
41
KITopen (Karlsruhe Institute of Technologie)
34
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne)
22
Curtin University: espace
18
Ghent University Academic Bibliography
16
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
14
The University of Adelaide: Digital Library
12
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
6
DESY Publication Database (PUBDB)
6
Université de Nantes: HAL-UNIV-NANTES
5
Unknown
5
Loyola University Chicago: Loyola eCommons
4
Uppsala University: Publications (DiVA)
4
IOP Publishing (via Crossref)
3
Max Planck Society: MPG.PuRe
3
OPUS FAU - Online publication system of Friedrich-Alexander-Universität Erlangen-Nürnberg
3
Open-Access-Publikationsserver der Humboldt-Universität: edoc-Server
3
Radboud University: DSpace
3
The University of Kansas: KU ScholarWorks
3
Eldorado - Repositorium der TU Dortmund
2
NASA Technical Reports Server (NTRS)
2
ScienceDirect (Elsevier - via Crossref)
2
ScienceDirect (Elsevier)
2
DSpace@MIT (Massachusetts Institute of Technology)
1
IOP Publishing
1
PubMed Central (PMC)
1
RWTH Aachen University: RWTH Publications
1
University of Copenhagen: Research
1
Università degli Studi di Bari Aldo Moro: CINECA IRIS
1