中国科学院数学与系统科学研究院期刊网
AMS
The Unfolding of Equivariant Bifurcation Problems with Two Types of State Variables in the Presence of Parameter Symmetry
Deng Lan CUI, Yang Cheng LI
Acta Mathematica Sinica . 2006, (5): 1433 -1440 .  DOI: 10.1007/s10114-005-0712-4