On some Leindler's theorem on application of the class NMCS
  We show the results in the class GM(5b) corresponding to the theorem of L. Leindler [A note on strong approximation of Fourier series, Analysis Mathematica, 29(2003), 195--199] on strong approximation by matrix means of Fourier series constructed by the sequences from the class NMCS. 
W{\l}odzimierz {\L}enski and Bogdan Szal
math.CA