- Maiga Chang, Demetrios G. Sampson, Ronghuai Huang, Alex Sandro Gomes, Nian-Shing Chen, Ig Ibert Bittencourt, Kinshuk, Diego Dermeval, Ibsen Mateus Bittencourt, editors, 19th IEEE International Conference on Advanced Learning Technologies, ICALT 2019, Maceió, Brazil, July 15-18, 2019. IEEE, 2019.