On the Approximation Properties of Cesàro Means of Negative Order of Walsh-Fourier Series. - Ushangi Goginava (J. Approx. Theory, 2002)

Uniform convergence of Cesàro means of negative order of double Walsh-Fourier series. - Ushangi Goginava (J. Approx. Theory, 2003)

Almost everywhere convergence of (C, alpha)-means of cubical partial sums of d-dimensional Walsh-Fourier series. - Ushangi Goginava (J. Approx. Theory, 2006)

On the Fejér means of double Fourier series with respect to the Walsh-Kaczmarz system. - Ushangi Goginava; Károly Nagy (Period. Math. Hung., 2007)

The weak type inequality for the maximal operator of the Marcinkiewicz-Fejér means of the two-dimensional Walsh-Fourier series. - Ushangi Goginava (J. Approx. Theory, 2008)

Restricted maximal operators of Fejér means of double Walsh-Fourier series. - Ushangi Goginava (Period. Math. Hung., 2009)

A note on strong summability of two-dimensional Walsh-Fourier series. - Ushangi Goginava; Larry Gogoladze (Period. Math. Hung., 2013)

The two-dimensional Fejér means on diagonal Hardy space. - Ushangi Goginava; Károly Nagy (Period. Math. Hung., 2015)

Cesàro means with varying parameters of Walsh-Fourier series. - György Gát; Ushangi Goginava (Period. Math. Hung., 2023)