Rhoades, B.E. 2002. On the degree of approximation of the conjugate of a function belonging to the weighted $ W(L^p, \xi(t))$ class by matrix means of the conjugate series of a Fourier series. Tamkang Journal of Mathematics. 33, 4 (Dec. 2002), 365–370. DOI:https://doi.org/10.5556/j.tkjm.33.2002.285.