引用本文:

张远征　. L⁴中平均曲率方向平行的类时曲面的等距变形[J]. 浙江大学学报（理学版）, 2001, 28(4): 364-.

ZHANG Yuan-Zheng-　. Isometric deformation of timelike surfaces with parallel mean curvature direction in L₄.. Journal of Zhejiang University (Science Edition), 2001, 28(4): 364-.

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https://www.zjujournals.com/sci/CN/    或    https://www.zjujournals.com/sci/CN/Y2001/V28/I4/364