@inproceedings{KEOD-2011-BelouaerBM,
	author        = "Lamia Belouaer and Maroua Bouzid and Abdel-Illah Mouaddib",
	booktitle     = "{Proceedings of the Third International Conference on Knowledge Engineering and Ontology Development}",
	isbn          = "978-989-8425-80-5",
	pages         = "71--80",
	publisher     = "{SciTePress}",
	title         = "{Spatial Knowledge in Planning Language}",
	year          = 2011,
}