@article {3134,
	title = {New Sensorless Speed Control of IPMSM Based on Backstepping Observer},
	journal = {J. Automation \& Systems Engineering },
	volume = {11 N{\textdegree}3},
	year = {2017},
	pages = {230-243},
	author = {S. Nadji and S. Benaicha}
}
