Sustained cocaine abstinence in intravenous drug abusers through voucher-based reinforcement therapy.

Silverman K, Higgins ST, Brooner RK, Montoya ID, Cone EJ, Schuster CR, Preston KL (1996). Sustained cocaine abstinence in intravenous drug abusers through voucher-based reinforcement therapy. Archives of General Psychiatry 53, 409-415.