Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
10
University of Calgary Journal Hosting
7
Directory of Open Access Journals: DOAJ Articles
6
PANGAEA - Data Publisher for Earth & Environmental Science
5
MDPI Open Access Publishing
3
University of Alaska: ScholarWorks@UA
2
Unknown
2
ARPI - Archivio della Ricerca dell'Università di Pisa
1
Defense Technical Information Center: DTIC Technical Reports database
1
Digital Collections of Colorado (Colorado State University)
1
Mountain Scholar (Digital Collections of Colorado and Wyoming)
1
Queen's University, Ontario: QSpace
1
University of Minnesota Digital Conservancy
1
University of Nevada, Las Vegas: Digital Scholarship@UNLV
1
Érudit.org (Université Montréal)
1