Content Provider
Zenodo
53
NASA Technical Reports Server (NTRS)
9
IntechOpen (E-Books)
2
Ohio State University (OSU): Knowledge Bank
2
The Winnower
2
University of Washington, Seattle: Digital Collections
2
Unknown
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
BioMed Central
1
Digital.CSIC (Spanish National Research Council)
1
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System)
1
OSKAR Bordeaux (Open Science Knowledge ARchive)
1
Pensoft Publishers
1
The University of Brighton Research Portal
1
UWU eRepository (Uva Wellassa University)
1
University of Canterbury, Christchurch: UC Research Repository
1
Wiley Online Library
1