PETRINJAK, Anita; GRAHAM, Rodger. Creating Learning Objects from Pre-Authored Course Materials:Semantic Structure of Learning Objects — Design and Technology. Canadian Journal of Learning and Technology, [S. l.], v. 30, n. 3, 2004. DOI: 10.21432/T20W33. Disponível em: https://cjlt.ca/index.php/cjlt/article/view/26516. Acesso em: 5 apr. 2026.