@article {219227,
	title = {Second order nonlinear forced oscillations},
	journal = {DYNAMIC SYSTEMS AND APPLICATIONS},
	volume = {10},
	year = {2001},
	note = {n/a},
	pages = {455-464},
	publisher = {DYNAMIC PUBLISHERS ATLANTA},
	abstract = {n/a},
	isbn = {1056-2176},
	author = {Agarwal, RP and Grace, SR}
}
