Okuyama, Y <br/><br/>
Absolute summability of fourier series & orthogonal series 
Y. Okuyama 
 - Berlin  Springer  1984 
 - vi  118 
 - Lecture notes in mathematics 1067 .
<br/><br/><label>ISBN: </label>3540133550  
<br/><br/><label>Dewey Class. No.: </label>4.03+22  / OKUY