Baldiris Navarro, Silvia Margarita, Sabine Graf, Ramon Fabregat, and Nestor Darío Duque Méndez. “Searching for and Positioning of Contextualized Learning Objects”. The International Review of Research in Open and Distributed Learning 13, no. 5 (November 1, 2012): 76–101. Accessed April 24, 2024. https://www.irrodl.org/index.php/irrodl/article/view/1255.