Huizink, A. C., Levälahti, E., Korhonen, T., Dick, D. M., Pulkkinen, L., Rose, R. J., & Kaprio, J. (2010). Tobacco, Cannabis, and Other Illicit Drug Use Among Finnish Adolescent Twins: Causal Relationship or Correlated Liabilities? Rutgers University.

Huizink, Anja C., Esko Levälahti, Tellervo Korhonen, Danielle M. Dick, Lea Pulkkinen, Richard J. Rose, و Jaakko Kaprio. Tobacco, Cannabis, and Other Illicit Drug Use Among Finnish Adolescent Twins: Causal Relationship or Correlated Liabilities? Rutgers University, 2010.

Huizink, Anja C., et al. Tobacco, Cannabis, and Other Illicit Drug Use Among Finnish Adolescent Twins: Causal Relationship or Correlated Liabilities? Rutgers University, 2010.