On the pointwise estimation of Cesàro kernel of negative order with respect to Walsh-Paley system. Tevzadze, V. — 2005 Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]
Summability of Fourier series with respect to the Walsh-Paley system. Tevzadze, V. — 2006 Acta Mathematica Academiae Paedagogicae Nyí regyháziensis. New Series [electronic only]