1. Agaev, G. H., Ya, N., Vilenkin, G. M. and Dzhafarli, A. I., Rubinstein, Multiplicative Systems of Functions and Harmonic Analysis on 0-Dimensional Groups, Izd. “ELM” (Baku, USSR), (1981).
2. Gát, G., Cesaro Means of Integrable Functions with Respect to Unbounded Vilenkin Systems, Journal of Approximation Theory, 124:1(2003), 25–43.
3. Gát, G., Pointwise Convergence of the Fejér Means of Functions on Unbounded Vilenkin Groups, Journal of Approximation Theory, 101:1(1999), 1–36.
4. Gát, G. and Goginava, U., Uniform and L-Convergence of Logarithmic Means of Walsh-Fourier Series, Acta Mathematica Sinica (English Series), 22:2(2006), 497–506.
5. Goginava, U. and Tkebuchava, G., Convergence of Subsequences of Partial Sums and Logarithmic Means of Walsh-Fourier Series, Acta Sci. Math. (Szeged), 70(1992), 159–177.