@article {scl13,
	title = {Periodic Lyapunov functions for periodic TS systems},
	journal = {Systems \& Control Letters},
	volume = {62},
	number = {4},
	year = {2013},
	month = {April},
	pages = {303{\textendash}310},
	author = {Zs{\'o}fia Lendek and J. Lauber and Thierry-Marie Guerra}
}
