中国科学院数学与系统科学研究院期刊网
θ-Pairs for Subgroups and Structure of Groups
Shi Heng LI(1); Wu Jie SHI(2); Deng Feng LIANG(3)
Acta Mathematica Sinica, Chinese Series . 2008, (3): 559 -566 .  DOI: 10.12386/A2008sxxb0066