by Aktan, Georgia B., Calkins, Richard F., Johnson, David R.
Published in Substance use & misuse (01.01.2001)

by Aktan, G B, Kumpfer, K L, Turner, C W
Published in Substance use & misuse (01.01.1996)

by Aktan, G B
Published in International journal of the addictions (01.01.1995)

by Aktan, G B, Calkins, R F, Ribisl, K M, Kroliczak, A, Kasim, R M
Published in The American journal of drug and alcohol abuse (01.01.1997)

by Calkins, R F, Aktan, G B, Hussain, K L
Published in Journal of psychoactive drugs (01.07.1995)

by Calkins, Richard F., Aktan, Georgia B.
Published in Journal of drug issues (2000)