Costello, Elizabeth Jane, Adrian Angold, Barbara J. Burns, Alaattin Erkanli, Dalene K. Stangl, Dan L. Tweed, and Carol M. Worthman. "The Great Smoky Mountains Study of Youth: Goals, Design, Methods, and the Prevalence of DSM-III-R Disorder." Archives of General Psychiatry 53, no. 12 (1996): 1129-1136.