Content Provider
Directory of Open Access Journals: DOAJ Articles
30
University of California: eScholarship
23
DataCite Metadata Store (German National Library of Science and Technology)
13
Frontiers (Publisher)
10
Oxford University Press
10
Wiley Online Library
6
Wiley Online Library (via Crossref)
6
Canadian Science Publishing (via Crossref)
4
Springer Nature (via Crossref)
4
ASM Journals (American Society for Microbiology - via Crossref)
3
ASM Journals (American Society for Microbiology)
3
Canadian Science Publishing
2
Mary Ann Liebert, Inc., publishers
2
ScienceDirect (Elsevier - via Crossref)
2
JSTOR (via Crossref)
1
LIU - Linköping University: Publications (DiVA)
1
Mary Ann Liebert, Inc., publishers (via Crossref)
1