Bartfai A, Pedersen NL, Asarnow RF, Schalling D: Genetic factors for the span of apprehension test; A study of normal twins. Psychiatry Res, 38(2): 115-124(1991).
Cornblatt BA, Risch NJ, Faris G, Friedman D, et al.: The Continuous Performance Test, identical pairs version (CPT-IP); II. New findings about sustained attention in normal families. Psychiatry Res, 26(2): 223-238(1988).
de Quervain DJ, Henke K, Aerni A, Coluccia D, et al.: A functional genetic variation of the 5-HT2A receptor affects human memory. Nat Neurosci, 6(11): 1141-1142(2003).