The Fourier--Walsh series of the functions absolutely continuous in the generalized restricted sense. Lukomskij, S.F. — 2007 Sibirskij Matematicheskij Zhurnal
Λ ( Ψ ) -Fluctuation and the Fourier–Walsh series of bounded functions. Lukomskij, S.F. — 2007 Sibirskij Matematicheskij Zhurnal