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13
CNS Scientific Journals Online
7
Directory of Open Access Journals: DOAJ Articles
6
Geological Quarterly
3
Adam Mickiewicz University in Poznań: PRESSto
2
DataCite Metadata Store (German National Library of Science and Technology)
2
Jagiellonian University Repository
2
Portal Czasopism Naukowych (E-Journals)
2
Repozytorium Uniwersytetu w Białymstoku (RUB)
2
University of Lodz Repository (RUŁ)
2
AMUR - Adam Mickiewicz University Repository, Poznan
1
Akademicka Platforma Czasopism
1
Akademicka Platforma Czasopism (APCZ)
1
Journals University of Lodz
1
Nicolaus Copernicus University (UMK) Torun: RUM@K
1
Repozytorium Instytucjonalne KUL (Katolicki Uniwersytet Lubelski Jana Pawła II)
1
TN KUL OJS system
1
The Repository of the University of Silesia (RE-BUŚ)
1