J. . Rubio Gonçalves and S. A. Nappo, “The Reasons for and Consequences of the Combined Use of Crack Cocaine and Alcohol in Brazil:: qualitative study”, Int J Innov Educ Res, vol. 8, no. 9, pp. 75–89, Sep. 2020, doi: 10.31686/ijier.vol8.iss9.2597.