Discriminative and reinforcing stimulus effects of nicotine, cocaine, and cocaine + nicotine combinations in rhesus monkeys
Experimental and Clinical Psychopharmacology (2011) - Comment
pubmed: 21480727  doi: 10.1037/a0023373  issn: 1936-2293  issn: 1064-1297 

Nancy K. Mello, Jennifer L. Newman