@article {tzamtzi1999stability,
	title = {Stability robustness of feedback linearisable systems with input unmodelled dynamics},
	journal = {IEE Proceedings-Control Theory and Applications},
	volume = {146},
	number = {1},
	year = {1999},
	pages = {77{\textendash}83},
	publisher = {IET},
	author = {Tzamtzi, MP and Tzafestas, SG}
}
