Teräs, Hanna, and Ümit Kartoğlu. “A Grounded Theory of Professional Learning in an Authentic Online Professional Development Program”. The International Review of Research in Open and Distributed Learning 18, no. 7 (November 29, 2017). Accessed October 18, 2019. http://www.irrodl.org/index.php/irrodl/article/view/2923.