Content Provider
Jagiellonian University Repository
38
Geological Quarterly
22
Unknown
17
Digital Repository of Scientific Institutes (RCIN)
16
Directory of Open Access Journals: DOAJ Articles
10
Portal Czasopism Naukowych (E-Journals)
10
Silesian University of Technology: Repolis
4
University of Lodz Repository (RUŁ)
4
MCS University Digital Library
3
The Repository of the University of Silesia (RE-BUŚ)
3
Czasopisma UKSW (Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie)
2
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe)
1
DataCite Metadata Store (German National Library of Science and Technology)
1
Jagiellonian University: Jagiellonian Digital Library
1
Journals University of Lodz
1
University of Rzeszów (UR): Repository
1
Université Grenoble Alpes: HAL
1
Université de Nantes: HAL-UNIV-NANTES
1