<span>Some Global Theorems on Closed Surfaces With Qenus Zero in E</span><sup>3</sup>

Some Global Theorems on Closed Surfaces With Qenus Zero in E³

周圣武, 刘金禄

Some Global Theorems on Closed Surfaces With Qenus Zero in E³

Zhou Shengwu, Liu Jinlu

数学季刊 . 1994, (1): 71 -77 .