共 11 条
[2]
[Anonymous], 1985, SINGULARITIES GROUPS
[3]
Ge W., 1994, Acta Appl. Math. Sinica, V17, P173
[5]
LI J, PERIODIC SOLUTION SO
[6]
LI J, IN PRESS NONLINEAR A
[7]
LI J, PROOF GEN KAPLAN YOR
[8]
Li J. B., 1994, The Theory and Applications of Generalized Hamilton System
[9]
Mawhin J., 1989, CRITICAL POINT THEOR
[10]
Meyer K. R., 1992, INTRO HAMILTONIAN DY