Loop transfer recovery design using biased and unbiased controllers. - Levent Turan; D. Lewis Mingori; Graham C. Goodwin (IEEE Trans. Autom. Control., 1994)

A unified loop transfer recovery approach to robust control using H∞ optimization methods. - Levent Turan; D. Lewis Mingori (Autom., 1995)

Synthesis of positive real feedback systems: a simple derivation via Parrott's theorem. - Levent Turan; Michael G. Safonov; C. H. Huang (IEEE Trans. Autom. Control., 1997)