Rubio Gonçalves, Janaina, and Solange Aparecida Nappo. “The Reasons for and Consequences of the Combined Use of Crack Cocaine and Alcohol in Brazil:: Qualitative Study”. International Journal for Innovation Education and Research, vol. 8, no. 9, Sept. 2020, pp. 75-89, https://doi.org/10.31686/ijier.vol8.iss9.2597.