G. R. M. . Ferreira, L. R. . Machado, and P. A. . Behar, “Social interactions in a virtual learning environment: a focus on group formation strategies”, Int J Innov Educ Res, vol. 6, no. 9, pp. 23–41, Sep. 2018, doi: 10.31686/ijier.vol6.iss9.1146.