References
- El-Geldawi, F., “Phase plane analysis of relay control systems with dead time”, Int. J. Control, 11 (1) (1970), 123–13.
- El-Geldawi, F., “Stabilization of a relay system containing three-position element and dead time”, Int. J. Control, 11 (2) (1970), 267–75.
- El-Geldawi, F., “More on phase plane analysis of relay control systems with dead time”, Int. J. Control, 11 (3) (1970), 499–507.
- Gille, J. C., Pelegrin, M. J. & Decaulne, P., “Feedback control systems—Analysis, synthesis and design”, (McGraw-Hill Book Co. Inc., New York), 1959, 446–74.