Acta Mathematica Sinica, English Series
Acta Mathematica Sinica, English Series > 2006 > 22 > 1 > 51- 60
Acta Mathematica Sinica, English Series > 2006 > 22 > 1 > 51-60
Acta Mathematica Sinica, English Series > 2006 > 22 > 1 > 51- 60
Acta Mathematica Sinica, English Series > 2006 > 22 > 1 > 51-60