[1] SHI Y G.The Limits of a Chebyshev-Type Theory of Restricted Range Approximation [J].Approx.Theory,1988,53:41-53.[2] CHALMERS B L,TAYLOR G D.Uniform Approximation with Constraints [J].Ber.Dt.Math-Verein,1979,81:49-86.[3] TAYLOR G D.Approximation by Functions Having Restricted Ranges III [J].Math.Anal.Appl.,1969,27:241-248.[4] TAYLOR G D.Approximation by Functions Having Restricted Ranges:Eqnality Case [J].Numer.Math.,1969,14:71-78.[5] KRA,SCHMIDT D.A Haar-Type Theory of Best Uniform Approximation Constraints [J].Acta.Math.Hung,1991,58：351-374.[6] 方东辉，李冲，杨文善.强CHIP性质和广义限制域逼近的特征 [J].数学学报，2004，(6)：41-49.[7] CHALMERS B L，TAYLOR G D.A Unified Theory of Strong Uniqueness in Uniform Approximation with Constraints [J].appoxi.theory,1981，37：29-43.[8] RICE J R.The Approximation Functions [M].London:Addison-Wesley Press,1964.
