[MathOuvrage]
Chebyshev polynomials
/ Mason, John ; Handscomb, David C..
-Boca Raton FL, London, New York NY : Chapman and Hall;CRC press, 2003. - xiv, 341 p. ; 24 cm
[MathOuvrage]
Introduction to approximation theory
/ Cheney, Elliott Ward.
-Providence RI : American mathematical Society, 1998. - x, 259 p. ; 23 cm