中国科学院数学与系统科学研究院期刊网
On Best Simultaneous Approximation from Suns to an Infinite Sequence in Banach Spaces
Xian Fa LUO(1),Jin Su HE(2),Ch
Acta Mathematica Sinica, Chinese Series . 2002, (2): 287 -294 .  DOI: 10.12386/A2002sxxb0036