A comparison of optimal and suboptimal auxiliary signal design approaches for robust failure detection. - Dongkyoung Choe; Stephen L. Campbell; Ramine Nikoukhah (CCA, 2005)

Comparison between failure detection test signals for continuous systems and sampled-data systems. - Dongkyoung Choe; Stephen L. Campbell; Ramine Nikoukhah (CDC, 2006)

Optimal piecewise-constant signal design for active fault detection. - Dongkyoung Choe; Stephen L. Campbell; Ramine Nikoukhah (Int. J. Control, 2009)