引用本文:

张远征　. S7中2型拓扑球面的Hopf型定理[J]. 浙江大学学报（理学版）, 2002, 29(2): 135-.

ZHANG Yuan-Zheng-　. . Journal of Zhejiang University (Science Edition), 2002, 29(2): 135-.

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https://www.zjujournals.com/sci/CN/    或    https://www.zjujournals.com/sci/CN/Y2002/V29/I2/135