Gillespie, N. A., Neale, M. C., Prescott, C. A., Aggen, S. H., Gardner, C. O., Jacobson, K., & Kendler, K. S. (2007). Longitudinal modeling of genetic and environmental influences on self-reported availability of psychoactive substances: Alcohol, cigarettes, marijuana, cocaine and stimulants.

Gillespie, Nathan A., Michael C. Neale, Carol A. Prescott, Steven H. Aggen, Charles O. Gardner, Kristen Jacobson, ja Kenneth S. Kendler. Longitudinal Modeling of Genetic and Environmental Influences On Self-reported Availability of Psychoactive Substances: Alcohol, Cigarettes, Marijuana, Cocaine and Stimulants. 2007.

Gillespie, Nathan A., et al. Longitudinal Modeling of Genetic and Environmental Influences On Self-reported Availability of Psychoactive Substances: Alcohol, Cigarettes, Marijuana, Cocaine and Stimulants. 2007.