中国科学院数学与系统科学研究院期刊网
Theorems of the Covering Surfaces and Multiple Values of the Algebroid Functions
Zong Sheng GAO,Feng Zhu WANG
Acta Mathematica Sinica, Chinese Series . 2001, (5): 805 -814 .  DOI: 10.12386/A2001sxxb0103