1. Set of matrices with common lyapunov solution;Ando;Arch. Math.,2001
2. Real perturbation values and real quadratic forms in complex vector space;Bernhardsson;Linear Algebra Appl.,1998
3. Linear Matrix Inequalities in Systems and Control theory;Boyd,1994
4. N. Cohen, I. Lewkowicz, Robust quadratic stability and convex invertible cones of matrices, Technical Report No. 797, Dept. of Electrical Engineering, Technion IIT, August 1991
5. Convex invertible cones and the Lyapunov equation;Cohen;Linear Algebra Appl.,1997