2 citations to https://www.mathnet.ru/eng/vmumm3625

1. S. M. Voronov, “Uniform convergence of Fourier series over Vilenkin system in the case of unbounded $p_k$”, Moscow University Mathematics Bulletin, 77:1 (2022), 41–45        
2. S. M. Voronov, “Analogue of the Hardy–Littlewood criterion for Fourier series over Vilenkin system in the case of unbounded $p_k$”, Moscow University Mathematics Bulletin, 75:2 (2020), 80–82