@conference {nikolopoulos2012creating,
	title = {Creating a LO Metadata Profile for Distance Learning: An Ontological Approach.},
	booktitle = {MTSR},
	year = {2012},
	pages = {37{\textendash}48},
	author = {Nikolopoulos, George and Kalou, Aikaterini K and Christos J. Pierrakeas and Kameas, Achilles}
}
