The Smoothed Spectral Abscissa for Robust Stability Optimization. - Joris Vanbiervliet; Bart Vandereycken; Wim Michiels; Stefan Vandewalle; Moritz Diehl (SIAM J. Optim., 2009)

Explicit expressions for the ℋ2 norm of time-delay systems based on the delay Lyapunov equation. - Elias Jarlebring; Joris Vanbiervliet; Wim Michiels (CDC, 2010)

Using spectral discretisation for the optimal ℋ2 design of time-delay systems. - Joris Vanbiervliet; Wim Michiels; Elias Jarlebring (Int. J. Control, 2011)

Characterizing and Computing the H2 Norm of Time-Delay Systems by Solving the Delay Lyapunov Equation. - Elias Jarlebring; Joris Vanbiervliet; Wim Michiels (IEEE Trans. Autom. Control., 2011)