Content Provider
Digital.CSIC (Spanish National Research Council)
6
Springer Nature
2
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center)
1
Cambridge University Press
1
Springer Nature (via Crossref)
1
University of Bayreuth: ERef Bayreuth
1
University of Wollongong, Australia: Research Online
1