中国科学院数学与系统科学研究院期刊网
Discreteness Criteria for Subgroups of Isometry Groups of Pinched Hadamard Manifolds by Use of a Test Map
Bin Lin DAI
Acta Mathematica Sinica, Chinese Series . 2013, (6): 935 -940 .  DOI: 10.12386/A2013sxxb0089