@article{article90e19c18,
title   = {Patterns of marihuana smoking among brazilian students},
author = {Silva, Maria Teresa de Araújo and Magalhaes, M P and Barros, R S and Almeida, Stella Pereira de and Azevedo, R and Oliveira, R. C.},
year = {1989},
doi = {10.1016/0376-8716(89)90022-7},
journal   = {Drugs and Alcohol Dependence}
}