Paavola Sami, Lakkala Minna, Muukkonen Hanni, Kosonen Kari, and Karlgren Klas. “The Roles and Uses of Design Principles for Developing the Trialogical Approach on Learning”. Research in Learning Technology 19, no. 3 (November 1, 2011). Accessed April 18, 2024. https://journal.alt.ac.uk/index.php/rlt/article/view/1252.