&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sendov Blagovest The Averaged Moduli of Smoothness. With Applications in Numerical Metod and Approximation./ Sendov Bl., Popov V.A. &mdash; Chichester : John Wiley & Sons Ltd., 1988. &mdash; 181 p.<br><br><br><br>УДК: 518 <br><br>[ SYS NUM: 4293 ]