中国科学院数学与系统科学研究院期刊网
AMS
The Total Embedding Distributions of Cacti and Necklaces
Yi Chao CHEN, Yan Pei LIU, Yan Pei LIU, Tao WANG
Acta Mathematica Sinica . 2006, (5): 1583 -1590 .  DOI: 10.1007/s10114-005-0856-2