- Small non-sigma-porous sets in topologically complete metric spaces1998 | Faculty of Mathematics and Physics
- Products of non-sigma-lower porous sets2013 | Faculty of Mathematics and Physics
- Upper Porous Sets which are Not-σ-Lower Porous2010 | Faculty of Mathematics and Physics
- Inscribing closed non-sigma-lower porous sets into Suslin non-sigma-lower porous sets +12005 | Faculty of Mathematics and Physics
- The structure of the sigma-ideal of sigma-porous sets2004 | Faculty of Mathematics and Physics