Ryder, A.G.; O'Connor, G.M.; Glynn, T.J. (1999) 'Identifications and quantitative measurements of narcotics in solid mixtures using near-IR Raman spectroscopy and multivariate analysis'. Journal Of Forensic Sciences, 44 (5):1013-1019.
Smyth, B., Fan, J., & Hser, Y.-I. (2006). Life expectancy and productivity loss among narcotics addicts thirty-three years after index treatment. Journal of Addictive Diseases, 25(4), 37-47.