RT Article T1 Law-Enforcement, the Price of Cocaine and Cocaine Use JF Mathematical and computer modelling VO 17 IS 2 SP 53 OP 64 A1 DiNardo, John E. 1961-2017 LA English YR 1993 UL https://krimdok.uni-tuebingen.de/Record/1912607085 DO 10.1016/0895-7177(93)90239-U