(en) (Nov 2008). A Non-Invasive Imaging Approach to Understanding Speech Changes following Deep Brain Stimulation in Parkinson's Disease. Am J Speech Lang Pathol18 (2): 146–61. PMID19029533. PMC2779712. DOI: 10.1044/1058-0360(2008/08-0004).
(en) (Nov 2008). A Non-Invasive Imaging Approach to Understanding Speech Changes following Deep Brain Stimulation in Parkinson's Disease. Am J Speech Lang Pathol18 (2): 146–61. PMID19029533. PMC2779712. DOI: 10.1044/1058-0360(2008/08-0004).