@conference {pierrakeas2012ontology,
	title = {An Ontology-Based Approach in Learning Programming Languages},
	booktitle = {Informatics (PCI), 2012 16th Panhellenic Conference on},
	year = {2012},
	pages = {393{\textendash}398},
	publisher = {IEEE},
	organization = {IEEE},
	author = {Christos J. Pierrakeas and Solomou, Georgia and Kameas, Achilles}
}
