中国科学院数学与系统科学研究院期刊网
Distortion Theorem for Bloch Mappings on the Unit Ball Bn
Jian Fei WANG, Tai Shun LIU
Acta Mathematica Sinica . 2009, (10): 1583 -1590 .  DOI: 10.1007/s10114-009-6677-y