Romero, Oscar, Guilherme Medeiros Machado, and Leandro Krug Wives.
" Analysis of Questionnaires for Virtual Learning Environments based on Item Response Theory." <em>Anais do XXX Simpósio Brasileiro de Informática na Educação,
Brasília/DF, 2019</em>. SBC, 2019,  
pp.509-518.