Author

Oksana Kovalenko

2 books found

Cover of Mathematics

Mathematics

Iryna Gavrysh, Olena Shcherbakova, Marharyta Bohdanovska, Oksana Kovalenko · First published 2026

Cover of Poltava XVII - XVIII stolitʹ

Poltava XVII - XVIII stolitʹ

Oksana Valentynivna Kovalenko · First published 2015