1. Existence and generic properties of L2 approximants for linear systems;Baratchart;Math. Control Inform.,1986
2. Recent and new results in rational L2 approximation;Baratchart,1987
3. Interpolation and Fourier coefficients in the Hardy space H2;Baratchart,1990
4. Index of critical points in rational L2 approximation;Baratchart;Syst. Control Lett.,1988
5. Asymptotic properties of critical points in rational L2 approximation;Baratchart,1990