Szerző: " Ziza Oksana Andreevna"

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Ziza Oksana Andreevna: On rearrangements of orthogonal systems. In: Acta scientiarum mathematicarum, (68) 1-2. pp. 229-236. (2002)

Ziza Oksana Andreevna: On absolute summability of orthogonal series by the generalized method of the summatorial function. In: Acta scientiarum mathematicarum, (64) 3-4. pp. 559-573. (1998)

Ziza Oksana Andreevna: Estimates of the rate of summability of orthogonal series by methods of the class {(φ,λ)}. In: Acta scientiarum mathematicarum, (63) 1-2. pp. 125-151. (1997)