French MT, Bradley CJ, Calingaert B, Dennis ML, Karuntzos GT. Cost analysis of training and employment services in methadone treatment. Eval Program Plann. 1994 Apr 1;17(2):107-20.
Dubrey SW, Gnanasakthy A, Stein WK, Song JG, Hardman T, Hynd J, Noble MI. Enoximone in chronic stable angina: a double-blind placebo-controlled cross-over trial. J Cardiovasc Pharmacol. 1994 Apr;23(4):532-8.