HRASTINSKI, Stefan; STENBOM, Stefan; SAQR, Mohammed; JANSSON, Malin; VIBERG, Olga. Examining the Development of K-12 Students’ Cognitive Presence Over Time: The Case of Online Mathematics Tutoring. Online Learning, Boston, MA, v. 27, n. 3, 2023. DOI: 10.24059/olj.v27i3.3481. Disponível em: https://olj.onlinelearningconsortium.org/index.php/olj/article/view/3481. Acesso em: 25 mar. 2026.