On the summability almost everywhere of orthonormal series by the method of first logarithmic means
Absolute Nörlund summability and orthogonal series
Further results concerning the Nörlund summability of orthogonal series
On the Nörlund summability of orthogonal series
On the summability almost everywhere of orthonormal series by the method of Euler-Knopp
Three theorems on a class of Nörlund means
On the absolute Nörlund summability of orthogonal series for a system of H-type
On a lemma of S. Kaczmarz
On the estimation of Cesàro means of orthonormal series
On very strong Riesz-summability of orthogonal series
Zastosowanie twierdzenia Mazura o mnożnikach uzbieżniających do ciągów limitowalnych metodą Eulera i Knoppa
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On a relation between some special methods of summation
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