Schmidt, Jan Philipp, Christine Geith, Stian Håklev, and Joel Thierstein. “Peer-To-Peer Recognition of Learning in Open Education”. The International Review of Research in Open and Distributed Learning 10, no. 5 (November 6, 2009). Accessed March 29, 2024. https://www.irrodl.org/index.php/irrodl/article/view/641.