Mosconi M, Nelson LM, Hooper SR. Confirmatory Factor Analysis of the NEPSY for younger and older school-age children. Psychol Rep. 2008 Jun;102(3):861-6.
Britt DM, Cohen LM, Collins FL, Cohen ML. Cigarette smoking and chewing gum: response to a laboratory-induced stressor. Health Psychol. 2001 Sep 1;20(5):361-8.