Acta Mathematica Sinica, English Series
Acta Mathematica Sinica, English Series > 2016 > 32 > 2 > 251-257
Acta Mathematica Sinica, English Series > 2016 > 32 > 12 > 1459-1464
Acta Mathematica Sinica, English Series > 2016 > 32 > 2 > 251-257
Acta Mathematica Sinica, English Series > 2016 > 32 > 12 > 1459-1464