Content Provider
Directory of Open Access Journals: DOAJ Articles
4
MDPI Open Access Publishing
4
Charles University CU Digital repository
3
Altai State University: Scientific Journals of ASU
2
CyberLeninka (Scientific Electronic Library)
2
Ural State Forest Engineering University (USFEU): Electronic Archive
2
DataCite Metadata Store (German National Library of Science and Technology)
1
Ice and Snow (E-Journal)
1
Norwegian Institute for Nature Research: Brage NINA
1
University of Tyumen: UTMN Repository
1
Unknown
1
Zenodo
1