Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
2,521
Unknown
35
PubMed Central (PMC)
16
University of Nebraska-Lincoln: DigitalCommons@UNL
10
BioOne Online Journals
3
Copernicus Publications: E-Journals
3
Digital Commons @ CSUMB (California State University, Monterey Bay)
3
University of South Florida St. Petersburg: Digital USFSP
3
DigitalCommons@CalPoly (California Polytechnic State University, San Luis Obispo)
2
HighWire Press (Stanford University)
2
Purdue University: e-Pubs
2
UTSA Digital Collections (The University of Texas at San Antonio)
2
University of Colorado, Boulder: CU Scholar
2
ArXiv.org (Cornell University Library)
1
Arctic Portal Library
1
Brigham Young University (BYU): ScholarsArchive
1
CyberLeninka (Scientific Electronic Library)
1
Defense Technical Information Center: DTIC Technical Reports database
1
Economic Commission for Latin America and the Caribbean (ECLAC): Digital Repository
1
Electronic Theses of LMU Munich (Ludwig-Maximilians-Universität)
1
Furman University Scholar Exchange (FUSE)
1
Hathi Trust Digital Library
1
IRD (Institute de recherche pour le développement): Horizon
1
Knowledge@UChicago (University of Chicago)
1
MDPI Open Access Publishing
1
Montclair State University Digital Commons
1
Saint Louis University Libraries Digital Collections
1
San José State University: SJSU ScholarWorks
1
Santa Clara University: Scholar Commons
1
University of Maine, School of Law: Digital Commons
1
University of Rhode Island: DigitalCommons@URI
1
Western Washington University: CEDAR (Contributing to Education through Digital Access to Research)
1
dadun - Depósito Académico Digital Universidad de Navarra
1
Érudit.org (Université Montréal)
1