Early decision making when using proper auxiliary signals. - Stephen L. Campbell; Kimberly Drake; Ramine Nikoukhah (CDC, 2002)

Analysis of spline based auxiliary signal design for failure detection in delay systems. - Stephen L. Campbell; Kimberly Drake; Ramine Nikoukhah (SMC, 2003)

An active approach for detection of incipient faults. - Ramine Nikoukhah; Stephen L. Campbell; Kimberly Drake (Int. J. Syst. Sci., 2010)