Minimal projections onto hyperplanes in vector-valued sequence spaces. - Beata Deregowska; Barbara Lewandowska (J. Approx. Theory, 2015)

A Multiplicity Theorem for Superlinear Double Phase Problems. - Beata Deregowska; Leszek Gasinski; Nikolaos S. Papageorgiou (Symmetry, 2021)

Minimal projections onto subspaces generated by sign-matrices. - Beata Deregowska; Barbara Lewandowska; Grzegorz Lewicki (J. Approx. Theory, 2024)