@article {64955,
	title = {Structural dynamics analysis of three-dimensional bi-axial sun-tracking system structure determined by numerical modal analysis},
	journal = {Journal of Solar Energy EngineeringJournal of Solar Energy Engineering},
	volume = {140},
	year = {2018},
	month = {2018},
	isbn = {0199-6231},
	author = {FERROUDJI, Fateh and Khelifi, Cherif and OUTTAS, Toufik}
}
