1) Darley, F.L., Aronson, A.E. and Brown, J.R.: Motor Speech disorders. W.B. Saunders Co., Philadelphia, 1975.
2) Darley, F.L., Aronson, A.E, and Brown, J.R.: Differential diagnostic patterns of dysarthria. J. Speech and Hearing Dis., 12: 246-269, 1969.
3) Darley, F.L., Aronson, A.E. and Brown, J.R.: Clusters of deviant speech dimensions in the dysarthrias. J. of Speech and Hearing Res., 12: 462-469, 1969.