Ricci Bitti, Pio E., Luisa Bonfiglioli, Paolo Melani, Roberto Caterina, and Pierluigi Garotti. “Expression and Communication of doubt/Uncertainty through Facial Expression”. Ricerche di Pedagogia e Didattica. Journal of Theories and Research in Education 9, no. 1 (January 1, 2014): 159–177. Accessed May 4, 2024. https://rpd.unibo.it/article/view/4296.