BOLLEN, Lars; GIJLERS, Hannie; VAN JOOLINGEN, Wouter. Drawings in Computer-Supported Collaborative Learning - Empirical and Technical Results. Computing and Informatics, [S. l.], v. 34, n. 3, p. 559–587, 2015. Disponível em: https://www.cai.sk/ojs/index.php/cai/article/view/3221. Acesso em: 9 may. 2025.