@ARTICLE{
TITLE="On the Kalman-Yakubovich-Popov lemma and common Lyapunov solutions for matrices with regular inertia",
AUTHOR="O. Mason, R. Shorten and S. Solmaz",
YEAR="2007",
VOLUME="420",
NUMBER="",
PAGES="183-197",
JOURNAL="Linear Algebra and its Applications"
}