1. Darley FL, Aronson AE, Brown JR. Differential diagnostic patterns of dysarthria. J Speech Hear Res 1969; 12: 246–269.
2. Darley FL, Aronson AE, Brown JR. Clusters of deviant speech dimensions in the dysarthrias. J Speech Hear Res 1969; 12: 462–496.
3. Duffy JR. Motor Speech Disorders: Substrates, Differential Diagnosis, and Management, Mosby, St. Louis, 1995.
4. McNeil MR. Clinical Management of Sensorimotor Speech Disorders, Thieme, New York, 1997. Yorkston KM. Treatment efficacy: dysarthria. J Speech Hear Res 1996; 39: S46 - S57.
5. Yorkston KM, Beukelman DR, Bell KR. Clinical Management of Dysarthric Speakers, Little, Brown & Company, Boston, 1988.