- On the Pythagoras number of the simplest cubic fields2023 | Faculty of Mathematics and Physics
- Pythagoras numbers of orders in biquadratic fields2022 | Faculty of Mathematics and Physics
- A cubic ring of integers with the smallest Pythagoras number2022 | Faculty of Mathematics and Physics
- On quadratic Waring's problem in totally real number fields2023 | Faculty of Mathematics and Physics
- Sums of squares in S-integers2020 | Faculty of Mathematics and Physics
- Lifting problem for universal quadratic forms2021 | Faculty of Mathematics and Physics