Gilman, S. M., Galanter, M., & Dermatis, H. (dec 2001). "Methadone Anonymous: A 12-step program for methadone maintained heroin addicts". Substance Abuse. 22 (4): 247–256. doi:10.1023/A:1012200712300. {{cite journal}}: Check date values in: |date= (help)CS1 maint: date and year (link) CS1 maint: multiple names: authors list (link)
MacGowan, R. J., Swanson, N. M., Brackbill, R. M., Rugg, D. L., &; et al. (July–September 1996). "Retention in methadone maintenance treatment programs, Connecticut and Massachusetts, 1990-1993". Journal of Psychoactive Drugs. 28 (3): 259–265. doi:10.1080/02791072.1996.10472487. PMID8895111. {{cite journal}}: Explicit use of et al. in: |author= (help)CS1 maint: date and year (link) CS1 maint: multiple names: authors list (link)
