1Fang G S,Liu Y P.Average width and optimal interpolation of the Sobolev_Wiener class Wr pq (R) in the metric Lq (R)[].Journal of Approximation Theory.1993
2Fournier J J F,Stewart J.Amalgams of Lp and lq[].Bulletin of the American Mathematical Society.1985
3Li Chun.Infinite dimensional widths of function classes[].Journal of Approximation Theory.1992
4Schoenberg I J.Cardinal interpolation and spline functions Ⅱ.Interpolation of data of power growth[].Journal of Approximation Theory.1972
