id	keyword
ejpam-5662	a. a.
ejpam-5662	nonlinear
ejpam-5662	m. a.
ejpam-5662	system
ejpam-5662	moatimid
ejpam-5662	parametric
ejpam-5662	frequency
ejpam-5662	solutions
ejpam-5662	oscillator
ejpam-5662	a. mohamed
ejpam-5662	pure