Sufficient LMI conditions for output feedback control problems. - César A. R. Crusius; Alexandre Trofino (IEEE Trans. Autom. Control., 1999)

Optimization of phase-locked loop circuits via geometric programming. - David M. Colleran; Clemenz L. Portmann; Arash Hassibi; César A. R. Crusius; Sunderarajan S. Mohan; Stephen P. Boyd; Thomas H. Lee; Maria del Mar Hershenson (CICC, 2003)