Harris, Kendra M.; Mahone, E. Mark; Singer, Harvey S. (2008). «Nonautistic Motor Stereotypies: Clinical Features and Longitudinal Follow-Up». Pediatric Neurology38 (4): 267 - 272. ISSN0887-8994. doi:10.1016/j.pediatrneurol.2007.12.008.
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Harris, Kendra M.; Mahone, E. Mark; Singer, Harvey S. (2008). «Nonautistic Motor Stereotypies: Clinical Features and Longitudinal Follow-Up». Pediatric Neurology38 (4): 267 - 272. ISSN0887-8994. doi:10.1016/j.pediatrneurol.2007.12.008.