Modeling the characteristics of a learning object for use within e-learning applications. - George Nikolopoulos; Georgia D. Solomou; Christos Pierrakeas; Achilles Kameas (BCI, 2012)

Creating a LO Metadata Profile for Distance Learning: An Ontological Approach. - George Nikolopoulos; Aikaterini K. Kalou; Christos Pierrakeas; Achilles Kameas (MTSR, 2012)