Spectral entropy signature of speech perturbation in adult acquired growth hormone deficiency. - Christopher J. Moore; Kathiresan Manickam; Steven Shalet; Terry Willard; Susan Jones (MAVEBA, 2003)

Quantifying aberrant phonation using approximate entropy in electrolaryngography. - Kathiresan Manickam; Christopher J. Moore; Terry Willard; Nicholas Slevin (Speech Commun., 2005)