Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
64
ArXiv.org (Cornell University Library)
41
KITopen (Karlsruhe Institute of Technologie)
27
Ghent University Academic Bibliography
16
SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy)
14
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne)
9
DESY Publication Database (PUBDB)
6
Unknown
3
Eldorado - Repositorium der TU Dortmund
2
DSpace@MIT (Massachusetts Institute of Technology)
1
RWTH Aachen University: RWTH Publications
1
ScienceDirect (Elsevier - via Crossref)
1
Università degli Studi di Bari Aldo Moro: CINECA IRIS
1