@ARTICLE{
TITLE="Quadratic stability and singular SISO switching systems",
AUTHOR="R. Shorten, M. Corless, K. Wulff, S. Klinge, R.H. Middleton",
YEAR="2009",
VOLUME="54",
NUMBER="11",
PAGES="2714-2718",
JOURNAL="IEEE Transactions on Automatic Control"
}