Fundamental limitations due to jomega-axis zeros in SISO systems. - Graham C. Goodwin; A. R. Woodyatt; Richard H. Middleton; J. Shim (Autom., 1999)

An integral constraint for single input two output feedback systems. - A. R. Woodyatt; James S. Freudenberg; Richard H. Middleton (Autom., 2001)