Casagranda M, Molinari A, Tomasini S. The production of learning objects and the activity of facilitating learning: an hypothesis of cost quantifcation. Je-LKS [Internet]. 2010Apr.3 [cited 2024Oct.30];6(1). Available from: http://je-lks.org/ojs/index.php/Je-LKS_EN/article/view/387