The first part deals with the construction of semisymmetric graphs and the second part classifies the edge-transitive regular coverings of the cube, whose covering transformation groups are iso-morphic to the elementary abelian p-groups.

• 第一部分是关于半对称图的分类，第二部分是关于立方体边传递的正则覆盖图的分类，其覆盖变换群同构于初等交换p-群。