中国科学院数学与系统科学研究院期刊网
On the Approximation by Reciprocals of Polynomials with Positive Coefficientes in L~1 Spaces
Xue Feng MEI(1), Song Ping ZHO
Acta Mathematica Sinica, Chinese Series . 2004, (6): 1071 -107 .  DOI: 10.12386/A2004sxxb0133