Content Provider
ScienceDirect (Elsevier - via Crossref)
72
Directory of Open Access Journals: DOAJ Articles
8
ScienceDirect (Elsevier)
6
Università degli Studi di Ferrara: CINECA IRIS
4
Wiley Online Library
4
Wiley Online Library (via Crossref)
3
Schweizerbart Science Publishers (via Crossref)
2
Boise State University: Scholar Works
1
Padua Research Archive (IRIS - Università degli Studi di Padova)
1
University of Kentucky: UKnowledge
1
Unknown
1
Vrije Universiteit Amsterdam (VU): Research Portal
1