Content Provider
DataCite Metadata Store (German National Library of Science and Technology)
71
PANGAEA - Data Publisher for Earth & Environmental Science
69
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
20
Frontiers (Publisher)
2
PUB - Publications at Bielefeld University
2
PubMed Central (PMC)
2
Informa (via Crossref)
1
Wageningen UR (University & Research Centre): Digital Library
1