id	keyword
ejpam-5398	nonlinear
ejpam-5398	galal
ejpam-5398	stability
ejpam-5398	system
ejpam-5398	moatimid
ejpam-5398	time
ejpam-5398	frequency
ejpam-5398	fig
ejpam-5398	rod
ejpam-5398	journal
ejpam-5398	solution
ejpam-5398	pure