Grădinaru, Camelia. 2016. “Social Presence in Online Courses. Presuppositions, Perspectives and Interpretations of Humor”. Revista Educação E Cultura Contemporânea 13 (32):6-21. https://mestradoedoutoradoestacio.periodicoscientificos.com.br/index.php/reeduc/article/view/2474.