Combining cognitive behavioral therapy and contingency management to enhance their effects in treating cannabis dependence: less can be more, more or less

Carroll KM, Nich C, Lapaglia DM, Peters EN, Easton CJ, Petry NM (2012). Combining cognitive behavioral therapy and contingency management to enhance their effects in treating cannabis dependence: less can be more, more or less. Addiction. 107 (9), 1650-1659.