@article{miguel_madruga_simões_yamauchi_silva_mcdonell_mcpherson_roll_laranjeira_mari_2019,  title={Contingency management is effective in promoting abstinence and retention in treatment among crack cocaine users with a previous history of poor treatment response: a crossover trial},  volume={32},  ISSN={0102-7972},  url={https://doi.org/10.1186/s41155-019-0127-2},  DOI={10.1186/s41155-019-0127-2},  journal={Psicologia: Reflexão e Crítica},  publisher={Curso de Pós-Graduação em Psicologia da Universidade Federal do Rio Grande do Sul},  author={Miguel, André de Queiroz Constantino and Madruga, Clarice Sandi and Simões, Viviane and Yamauchi, Rodolfo and Silva, Claudio Jerônimo da and McDonell, Michael and McPherson, Sterling and Roll, John and Laranjeira, Ronaldo Ramos and Mari, Jair de Jesus},  year={2019},  pages={14} }