Some open problems on best approximation in normed linear spaces
On Some Duality Theorems for Bases, Finite Dimensional Decompositions and ... Systems.
On Biorthogonal Systems and Total Sequences of Functionals. II.
On Biorthogonal Systems and Total Sequences of Functionals.
On Banach spaces in which every M-basis is a generalized summation basis
On a problem of moments of S. Rolewicz
Sur une classe d’applications linéaires continues des espaces
Poznámka o norme v priestoroch
Points of diffusion of linear operators and almost diffuse operators in spaces of continuous functions.
Best Coapproximation in Normed Linear Spaces.
On shrinking basic sequences in Banach spaces
On Kadec-Klee norms on Banach spaces
Dualities associated to binary operations on .
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