Chapple P., (1972) Br. J. Addict.67 pp. 33-38. A Five Year Follow-up of 108 cases of Opiate Addiction.
2.
Mott J., Taylor M., (1974) Home Office Research Studies 23, Delinquency Amongst Opiate Users.
3.
Mott J., (1975) Bulletin on Narcotics XXVII No. 4. The Criminal Histories of male non-medical opiate users in the United Kingdom.
4.
Richardson H., Brooks J., Cohen M., Kern J., (1974) J. Drug Educ.4, IV, 389-398. A Three Year Follow-up Study of 43 Heroin Addicts in a Suburban Community.
5.
Vaillant G.E., (1973) Arch. Gen. Psych.29, 237-241. A 20 year Follow-up of New York Narcotic Addicts.