Some remarks on the Dini-Lipschitz test H. Ratajski — 1969 Commentationes Mathematicae The article contains no abstract
On pointwise convergence of orthogonal polynomial series H. Ratajski — 1967 Commentationes Mathematicae The article contains no abstract
An estimate for the Lebesgue ( C , 1 ) -functions of some polynomial-like system H. Ratajski — 1968 Commentationes Mathematicae The article contains no abstract