P. Oliveira, R. Rodrigues, and A. Maciel. " Development of Visualization Metaphors for Monitoring Student Engagement in Distance Learning Environments", in Anais do XXXIV Simpósio Brasileiro de Informática na Educação, Passo Fundo/RS, 2023, pp. 245-254, doi: https://doi.org/10.5753/sbie.2023.234819.