Rantavuori, Juhana, Yrjö Engeström, and Lasse Lipponen. “Learning Actions, Objects and Types of Interaction: A Methodological Analysis of Expansive Learning Among Pre-Service Teachers”. Frontline Learning Research 4, no. 3 (May 10, 2016): 1–27. Accessed May 1, 2024. https://journals.sfu.ca/flr/index.php/journal/article/view/174.