L2-Gain and Passivity Techniques in Nonlinear Control
Arjan van der Schaft
H.L. Trentelman, J.C. Willems, 'The dissipation inequality and the algebraic Riccati equation', in The Riccati equation (eds. S. Bittanti, A.J. Laub & J.C. Willems), pp. 197–242, Communication and Control Engineering Series, Springer-Verlag, ...