共 32 条
[11]
Variational approach for nonlinear oscillators
[J].
CHAOS SOLITONS & FRACTALS,
2007, 34 (05)
:1430-1439
[12]
HETHCOTE HW, 1992, LECT NOTES BIOMATH
[17]
Liu M. X., 2004, J BIOMATHEMATICS, V19, P551
[20]
Mo J. Q., 2009, CHINESE PHYS LETT, V26